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Publisher: Elsevier   (Total: 3031 journals)

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Showing 1 - 200 of 3031 Journals sorted alphabetically
AASRI Procedia     Open Access   (Followers: 15)
Academic Pediatrics     Hybrid Journal   (Followers: 20, SJR: 1.402, h-index: 51)
Academic Radiology     Hybrid Journal   (Followers: 16, SJR: 1.008, h-index: 75)
Accident Analysis & Prevention     Partially Free   (Followers: 79, SJR: 1.109, h-index: 94)
Accounting Forum     Hybrid Journal   (Followers: 22, SJR: 0.612, h-index: 27)
Accounting, Organizations and Society     Hybrid Journal   (Followers: 27, SJR: 2.515, h-index: 90)
Achievements in the Life Sciences     Open Access   (Followers: 4)
Acta Anaesthesiologica Taiwanica     Open Access   (Followers: 5, SJR: 0.338, h-index: 19)
Acta Astronautica     Hybrid Journal   (Followers: 302, SJR: 0.726, h-index: 43)
Acta Automatica Sinica     Full-text available via subscription   (Followers: 3)
Acta Biomaterialia     Hybrid Journal   (Followers: 25, SJR: 2.02, h-index: 104)
Acta Colombiana de Cuidado Intensivo     Full-text available via subscription  
Acta de Investigación Psicológica     Open Access   (Followers: 2)
Acta Ecologica Sinica     Open Access   (Followers: 8, SJR: 0.172, h-index: 29)
Acta Haematologica Polonica     Free   (SJR: 0.123, h-index: 8)
Acta Histochemica     Hybrid Journal   (Followers: 3, SJR: 0.604, h-index: 38)
Acta Materialia     Hybrid Journal   (Followers: 195, SJR: 3.683, h-index: 202)
Acta Mathematica Scientia     Full-text available via subscription   (Followers: 5, SJR: 0.615, h-index: 21)
Acta Mechanica Solida Sinica     Full-text available via subscription   (Followers: 9, SJR: 0.442, h-index: 21)
Acta Oecologica     Hybrid Journal   (Followers: 9, SJR: 0.915, h-index: 53)
Acta Otorrinolaringologica (English Edition)     Full-text available via subscription   (Followers: 1)
Acta Otorrinolaringológica Española     Full-text available via subscription   (Followers: 3, SJR: 0.311, h-index: 16)
Acta Pharmaceutica Sinica B     Open Access   (Followers: 2)
Acta Poética     Open Access   (Followers: 4)
Acta Psychologica     Hybrid Journal   (Followers: 21, SJR: 1.365, h-index: 73)
Acta Sociológica     Open Access  
Acta Tropica     Hybrid Journal   (Followers: 5, SJR: 1.059, h-index: 77)
Acta Urológica Portuguesa     Open Access  
Actas Dermo-Sifiliograficas     Full-text available via subscription   (Followers: 4)
Actas Dermo-Sifiliográficas (English Edition)     Full-text available via subscription   (Followers: 3)
Actas Urológicas Españolas     Full-text available via subscription   (Followers: 3, SJR: 0.383, h-index: 19)
Actas Urológicas Españolas (English Edition)     Full-text available via subscription   (Followers: 2)
Actualites Pharmaceutiques     Full-text available via subscription   (Followers: 5, SJR: 0.141, h-index: 3)
Actualites Pharmaceutiques Hospitalieres     Full-text available via subscription   (Followers: 4, SJR: 0.112, h-index: 2)
Acupuncture and Related Therapies     Hybrid Journal   (Followers: 4)
Ad Hoc Networks     Hybrid Journal   (Followers: 11, SJR: 0.967, h-index: 57)
Addictive Behaviors     Hybrid Journal   (Followers: 15, SJR: 1.514, h-index: 92)
Addictive Behaviors Reports     Open Access   (Followers: 5)
Additive Manufacturing     Hybrid Journal   (Followers: 7, SJR: 1.039, h-index: 5)
Additives for Polymers     Full-text available via subscription   (Followers: 20)
Advanced Drug Delivery Reviews     Hybrid Journal   (Followers: 119, SJR: 5.2, h-index: 222)
Advanced Engineering Informatics     Hybrid Journal   (Followers: 11, SJR: 1.265, h-index: 53)
Advanced Powder Technology     Hybrid Journal   (Followers: 16, SJR: 0.739, h-index: 33)
Advances in Accounting     Hybrid Journal   (Followers: 8, SJR: 0.299, h-index: 15)
Advances in Agronomy     Full-text available via subscription   (Followers: 15, SJR: 2.071, h-index: 82)
Advances in Anesthesia     Full-text available via subscription   (Followers: 24, SJR: 0.169, h-index: 4)
Advances in Antiviral Drug Design     Full-text available via subscription   (Followers: 3)
Advances in Applied Mathematics     Full-text available via subscription   (Followers: 6, SJR: 1.054, h-index: 35)
Advances in Applied Mechanics     Full-text available via subscription   (Followers: 10, SJR: 0.801, h-index: 26)
Advances in Applied Microbiology     Full-text available via subscription   (Followers: 21, SJR: 1.286, h-index: 49)
Advances In Atomic, Molecular, and Optical Physics     Full-text available via subscription   (Followers: 16, SJR: 3.31, h-index: 42)
Advances in Biological Regulation     Hybrid Journal   (Followers: 4, SJR: 2.277, h-index: 43)
Advances in Botanical Research     Full-text available via subscription   (Followers: 3, SJR: 0.619, h-index: 48)
Advances in Cancer Research     Full-text available via subscription   (Followers: 26, SJR: 2.215, h-index: 78)
Advances in Carbohydrate Chemistry and Biochemistry     Full-text available via subscription   (Followers: 9, SJR: 0.9, h-index: 30)
Advances in Catalysis     Full-text available via subscription   (Followers: 5, SJR: 2.139, h-index: 42)
Advances in Cellular and Molecular Biology of Membranes and Organelles     Full-text available via subscription   (Followers: 12)
Advances in Chemical Engineering     Full-text available via subscription   (Followers: 24, SJR: 0.183, h-index: 23)
Advances in Child Development and Behavior     Full-text available via subscription   (Followers: 10, SJR: 0.665, h-index: 29)
Advances in Chronic Kidney Disease     Full-text available via subscription   (Followers: 8, SJR: 1.268, h-index: 45)
Advances in Clinical Chemistry     Full-text available via subscription   (Followers: 28, SJR: 0.938, h-index: 33)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 18, SJR: 2.314, h-index: 130)
Advances in Computers     Full-text available via subscription   (Followers: 16, SJR: 0.223, h-index: 22)
Advances in Developmental Biology     Full-text available via subscription   (Followers: 11)
Advances in Digestive Medicine     Open Access   (Followers: 4)
Advances in DNA Sequence-Specific Agents     Full-text available via subscription   (Followers: 5)
Advances in Drug Research     Full-text available via subscription   (Followers: 22)
Advances in Ecological Research     Full-text available via subscription   (Followers: 39, SJR: 3.25, h-index: 43)
Advances in Engineering Software     Hybrid Journal   (Followers: 25, SJR: 0.486, h-index: 10)
Advances in Experimental Biology     Full-text available via subscription   (Followers: 7)
Advances in Experimental Social Psychology     Full-text available via subscription   (Followers: 38, SJR: 5.465, h-index: 64)
Advances in Exploration Geophysics     Full-text available via subscription   (Followers: 3)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 8)
Advances in Food and Nutrition Research     Full-text available via subscription   (Followers: 41, SJR: 0.674, h-index: 38)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 14)
Advances in Genetics     Full-text available via subscription   (Followers: 15, SJR: 2.558, h-index: 54)
Advances in Genome Biology     Full-text available via subscription   (Followers: 11)
Advances in Geophysics     Full-text available via subscription   (Followers: 6, SJR: 2.325, h-index: 20)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 18, SJR: 0.906, h-index: 24)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 8, SJR: 0.497, h-index: 31)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 22)
Advances in Imaging and Electron Physics     Full-text available via subscription   (Followers: 2, SJR: 0.396, h-index: 27)
Advances in Immunology     Full-text available via subscription   (Followers: 33, SJR: 4.152, h-index: 85)
Advances in Inorganic Chemistry     Full-text available via subscription   (Followers: 9, SJR: 1.132, h-index: 42)
Advances in Insect Physiology     Full-text available via subscription   (Followers: 3, SJR: 1.274, h-index: 27)
Advances in Integrative Medicine     Hybrid Journal   (Followers: 4)
Advances in Intl. Accounting     Full-text available via subscription   (Followers: 4)
Advances in Life Course Research     Hybrid Journal   (Followers: 7, SJR: 0.764, h-index: 15)
Advances in Lipobiology     Full-text available via subscription   (Followers: 1)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 8)
Advances in Marine Biology     Full-text available via subscription   (Followers: 16, SJR: 1.645, h-index: 45)
Advances in Mathematics     Full-text available via subscription   (Followers: 10, SJR: 3.261, h-index: 65)
Advances in Medical Sciences     Hybrid Journal   (Followers: 5, SJR: 0.489, h-index: 25)
Advances in Medicinal Chemistry     Full-text available via subscription   (Followers: 5)
Advances in Microbial Physiology     Full-text available via subscription   (Followers: 4, SJR: 1.44, h-index: 51)
Advances in Molecular and Cell Biology     Full-text available via subscription   (Followers: 21)
Advances in Molecular and Cellular Endocrinology     Full-text available via subscription   (Followers: 10)
Advances in Molecular Toxicology     Full-text available via subscription   (Followers: 6, SJR: 0.324, h-index: 8)
Advances in Nanoporous Materials     Full-text available via subscription   (Followers: 3)
Advances in Oncobiology     Full-text available via subscription   (Followers: 3)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 15, SJR: 2.885, h-index: 45)
Advances in Parallel Computing     Full-text available via subscription   (Followers: 7, SJR: 0.148, h-index: 11)
Advances in Parasitology     Full-text available via subscription   (Followers: 7, SJR: 2.37, h-index: 73)
Advances in Pediatrics     Full-text available via subscription   (Followers: 20, SJR: 0.4, h-index: 28)
Advances in Pharmaceutical Sciences     Full-text available via subscription   (Followers: 14)
Advances in Pharmacology     Full-text available via subscription   (Followers: 13, SJR: 1.718, h-index: 58)
Advances in Physical Organic Chemistry     Full-text available via subscription   (Followers: 7, SJR: 0.384, h-index: 26)
Advances in Phytomedicine     Full-text available via subscription  
Advances in Planar Lipid Bilayers and Liposomes     Full-text available via subscription   (Followers: 3, SJR: 0.248, h-index: 11)
Advances in Plant Biochemistry and Molecular Biology     Full-text available via subscription   (Followers: 8)
Advances in Plant Pathology     Full-text available via subscription   (Followers: 5)
Advances in Porous Media     Full-text available via subscription   (Followers: 4)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 18)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 17, SJR: 1.5, h-index: 62)
Advances in Psychology     Full-text available via subscription   (Followers: 56)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 5, SJR: 0.478, h-index: 32)
Advances in Radiation Oncology     Open Access  
Advances in Small Animal Medicine and Surgery     Hybrid Journal   (Followers: 1, SJR: 0.1, h-index: 2)
Advances in Space Research     Full-text available via subscription   (Followers: 332, SJR: 0.606, h-index: 65)
Advances in Structural Biology     Full-text available via subscription   (Followers: 7)
Advances in Surgery     Full-text available via subscription   (Followers: 6, SJR: 0.823, h-index: 27)
Advances in the Study of Behavior     Full-text available via subscription   (Followers: 28, SJR: 1.321, h-index: 56)
Advances in Veterinary Medicine     Full-text available via subscription   (Followers: 14)
Advances in Veterinary Science and Comparative Medicine     Full-text available via subscription   (Followers: 12)
Advances in Virus Research     Full-text available via subscription   (Followers: 5, SJR: 1.878, h-index: 68)
Advances in Water Resources     Hybrid Journal   (Followers: 42, SJR: 2.408, h-index: 94)
Aeolian Research     Hybrid Journal   (Followers: 5, SJR: 0.973, h-index: 22)
Aerospace Science and Technology     Hybrid Journal   (Followers: 303, SJR: 0.816, h-index: 49)
AEU - Intl. J. of Electronics and Communications     Hybrid Journal   (Followers: 8, SJR: 0.318, h-index: 36)
African J. of Emergency Medicine     Open Access   (Followers: 4, SJR: 0.344, h-index: 6)
Ageing Research Reviews     Hybrid Journal   (Followers: 7, SJR: 3.289, h-index: 78)
Aggression and Violent Behavior     Hybrid Journal   (Followers: 389, SJR: 1.385, h-index: 72)
Agri Gene     Hybrid Journal  
Agricultural and Forest Meteorology     Hybrid Journal   (Followers: 15, SJR: 2.18, h-index: 116)
Agricultural Systems     Hybrid Journal   (Followers: 29, SJR: 1.275, h-index: 74)
Agricultural Water Management     Hybrid Journal   (Followers: 36, SJR: 1.546, h-index: 79)
Agriculture and Agricultural Science Procedia     Open Access  
Agriculture and Natural Resources     Open Access   (Followers: 1)
Agriculture, Ecosystems & Environment     Hybrid Journal   (Followers: 48, SJR: 1.879, h-index: 120)
Ain Shams Engineering J.     Open Access   (Followers: 5, SJR: 0.434, h-index: 14)
Air Medical J.     Hybrid Journal   (Followers: 3, SJR: 0.234, h-index: 18)
AKCE Intl. J. of Graphs and Combinatorics     Open Access   (SJR: 0.285, h-index: 3)
Alcohol     Hybrid Journal   (Followers: 9, SJR: 0.922, h-index: 66)
Alcoholism and Drug Addiction     Open Access   (Followers: 5)
Alergologia Polska : Polish J. of Allergology     Full-text available via subscription   (Followers: 1)
Alexandria Engineering J.     Open Access   (Followers: 1, SJR: 0.436, h-index: 12)
Alexandria J. of Medicine     Open Access  
Algal Research     Partially Free   (Followers: 7, SJR: 2.05, h-index: 20)
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 3)
Allergologia et Immunopathologia     Full-text available via subscription   (Followers: 1, SJR: 0.46, h-index: 29)
Allergology Intl.     Open Access   (Followers: 5, SJR: 0.776, h-index: 35)
ALTER - European J. of Disability Research / Revue Européenne de Recherche sur le Handicap     Full-text available via subscription   (Followers: 6, SJR: 0.158, h-index: 9)
Alzheimer's & Dementia     Hybrid Journal   (Followers: 45, SJR: 4.289, h-index: 64)
Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring     Open Access   (Followers: 5)
Alzheimer's & Dementia: Translational Research & Clinical Interventions     Open Access   (Followers: 3)
American Heart J.     Hybrid Journal   (Followers: 45, SJR: 3.157, h-index: 153)
American J. of Cardiology     Hybrid Journal   (Followers: 47, SJR: 2.063, h-index: 186)
American J. of Emergency Medicine     Hybrid Journal   (Followers: 34, SJR: 0.574, h-index: 65)
American J. of Geriatric Pharmacotherapy     Full-text available via subscription   (Followers: 6, SJR: 1.091, h-index: 45)
American J. of Geriatric Psychiatry     Hybrid Journal   (Followers: 14, SJR: 1.653, h-index: 93)
American J. of Human Genetics     Hybrid Journal   (Followers: 32, SJR: 8.769, h-index: 256)
American J. of Infection Control     Hybrid Journal   (Followers: 25, SJR: 1.259, h-index: 81)
American J. of Kidney Diseases     Hybrid Journal   (Followers: 31, SJR: 2.313, h-index: 172)
American J. of Medicine     Hybrid Journal   (Followers: 48, SJR: 2.023, h-index: 189)
American J. of Medicine Supplements     Full-text available via subscription   (Followers: 3)
American J. of Obstetrics and Gynecology     Hybrid Journal   (Followers: 173, SJR: 2.255, h-index: 171)
American J. of Ophthalmology     Hybrid Journal   (Followers: 51, SJR: 2.803, h-index: 148)
American J. of Ophthalmology Case Reports     Open Access   (Followers: 2)
American J. of Orthodontics and Dentofacial Orthopedics     Full-text available via subscription   (Followers: 6, SJR: 1.249, h-index: 88)
American J. of Otolaryngology     Hybrid Journal   (Followers: 22, SJR: 0.59, h-index: 45)
American J. of Pathology     Hybrid Journal   (Followers: 23, SJR: 2.653, h-index: 228)
American J. of Preventive Medicine     Hybrid Journal   (Followers: 21, SJR: 2.764, h-index: 154)
American J. of Surgery     Hybrid Journal   (Followers: 32, SJR: 1.286, h-index: 125)
American J. of the Medical Sciences     Hybrid Journal   (Followers: 13, SJR: 0.653, h-index: 70)
Ampersand : An Intl. J. of General and Applied Linguistics     Open Access   (Followers: 5)
Anaerobe     Hybrid Journal   (Followers: 4, SJR: 1.066, h-index: 51)
Anaesthesia & Intensive Care Medicine     Full-text available via subscription   (Followers: 52, SJR: 0.124, h-index: 9)
Anaesthesia Critical Care & Pain Medicine     Full-text available via subscription   (Followers: 3)
Anales de Cirugia Vascular     Full-text available via subscription  
Anales de Pediatría     Full-text available via subscription   (Followers: 2, SJR: 0.209, h-index: 27)
Anales de Pediatría (English Edition)     Full-text available via subscription  
Anales de Pediatría Continuada     Full-text available via subscription   (SJR: 0.104, h-index: 3)
Analytic Methods in Accident Research     Hybrid Journal   (Followers: 2, SJR: 2.577, h-index: 7)
Analytica Chimica Acta     Hybrid Journal   (Followers: 38, SJR: 1.548, h-index: 152)
Analytical Biochemistry     Hybrid Journal   (Followers: 152, SJR: 0.725, h-index: 154)
Analytical Chemistry Research     Open Access   (Followers: 7, SJR: 0.18, h-index: 2)
Analytical Spectroscopy Library     Full-text available via subscription   (Followers: 10)
Anesthésie & Réanimation     Full-text available via subscription  
Anesthesiology Clinics     Full-text available via subscription   (Followers: 21, SJR: 0.421, h-index: 40)
Angiología     Full-text available via subscription   (SJR: 0.124, h-index: 9)
Angiologia e Cirurgia Vascular     Open Access  
Animal Behaviour     Hybrid Journal   (Followers: 141, SJR: 1.907, h-index: 126)
Animal Feed Science and Technology     Hybrid Journal   (Followers: 5, SJR: 1.151, h-index: 83)
Animal Reproduction Science     Hybrid Journal   (Followers: 5, SJR: 0.711, h-index: 78)
Annales d'Endocrinologie     Full-text available via subscription   (SJR: 0.394, h-index: 30)
Annales d'Urologie     Full-text available via subscription  
Annales de Cardiologie et d'Angéiologie     Full-text available via subscription   (SJR: 0.177, h-index: 13)
Annales de Chirurgie de la Main et du Membre Supérieur     Full-text available via subscription  
Annales de Chirurgie Plastique Esthétique     Full-text available via subscription   (Followers: 2, SJR: 0.354, h-index: 22)
Annales de Chirurgie Vasculaire     Full-text available via subscription   (Followers: 1)

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Journal Cover Advanced Powder Technology
  [SJR: 0.739]   [H-I: 33]   [16 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 0921-8831 - ISSN (Online) 1568-5527
   Published by Elsevier Homepage  [3031 journals]
  • Core-shell composite nanoparticles with magnetic and temperature dual
           stimuli-responsive properties for removing emulsified oil
    • Authors: Ming Duan; Zipei Xu; Yali Zhang; Shenwen Fang; Xianyu Song; Yan Xiong
      Pages: 1291 - 1297
      Abstract: Publication date: May 2017
      Source:Advanced Powder Technology, Volume 28, Issue 5
      Author(s): Ming Duan, Zipei Xu, Yali Zhang, Shenwen Fang, Xianyu Song, Yan Xiong
      Core-shell magnetic and thermosensitive composite nanoparticles, named as M-DMEA, were prepared by grafting polyoxyalkylated N,N-dimethylethanolamine onto magnetite (Fe3O4) nanoparticles. A series of characterizations were performed to figure out the properties of the as-prepared M-DMEA. The results reveal that the M-DMEA is superparamagnetic and has irregular shape with a core-shell structure. The flocculation performance of M-DMEA in oily wastewater produced from flooding (OWPF) treatment was investigated for the first time. It was found that the M-DMEA could separate emulsified oil droplets from OWPF rapidly under an external magnetic field with high oil removal (92.3% at the dosage of 2.5g/L) at 65°C. Moreover, due to its excellent magnetic response, the M-DMEA can be collected and recycled for another 3 cycles. Factors affecting the flocculation performance were discussed in detail. It is anticipated that as-prepared M-DMEA might find its potential application in practical oily wastewater treatment.
      Graphical abstract image

      PubDate: 2017-04-25T14:38:22Z
      DOI: 10.1016/j.apt.2017.02.017
       
  • Nano-TiO2-SiO2 powder as inorganic support for hybrid pigment preparation
    • Authors: Katarzyna Siwińska-Stefańska; Karolina Szwarc-Rzepka; Adam Piasecki; Teofil Jesionowski
      Pages: 1298 - 1308
      Abstract: Publication date: May 2017
      Source:Advanced Powder Technology, Volume 28, Issue 5
      Author(s): Katarzyna Siwińska-Stefańska, Karolina Szwarc-Rzepka, Adam Piasecki, Teofil Jesionowski
      A study was made of the adsorption of three selected food dyes (C.I. Food Black 1, C.I. Food Brown 3 and C.I. Food Green 4) on the surface of an inorganic, synthetic TiO2-SiO2 support of anatase form. This produces new hybrid pigments having desirable physicochemical and functional properties due to the presence in their structure of the TiO2-SiO2 support. The process of adsorption was conducted for dye concentrations ranging from 10 to 50mg/dm3. The physicochemical properties of the inorganic support and the resulting hybrid pigments were determined. The characterisation included determination of the dispersion and morphology of the systems (particle size distribution, SEM images), porous structure parameters (BET isotherms) and electrokinetic properties (zeta potential and electrophoretic mobility), as well as thermal stability and colorimetric parameters. The efficiency of food dye adsorption on TiO2-SiO2 was examined, and the degree of coverage of the inorganic support with the food dyes was also estimated based on elemental analysis results. The results were used to evaluate the quality of the functional hybrid pigments obtained using selected food dyes and TiO2-SiO2 support, and to determine how the adsorption efficiency is affected by the dye structure. Selected diazo food dyes were more effectively adsorbed on the surface of the synthetic TiO2-SiO2 support. The hybrid pigments obtained have desirable physicochemical and functional properties. The synthesised food dye/TiO2-SiO2 hybrids may be used in pharmaceutical products.
      Graphical abstract image

      PubDate: 2017-04-25T14:38:22Z
      DOI: 10.1016/j.apt.2017.02.018
       
  • Exploration of structural, thermal, vibrational and spectroscopic
           properties of new noncentrosymmetric double borate Rb3NdB6O12
    • Authors: V.V. Atuchin; A.K. Subanakov; A.S. Aleksandrovsky; B.G. Bazarov; J.G. Bazarova; S.G. Dorzhieva; T.A. Gavrilova; A.S. Krylov; M.S. Molokeev; A.S. Oreshonkov; A.M. Pugachev; Yu.L. Tushinova; A.P. Yelisseyev
      Pages: 1309 - 1315
      Abstract: Publication date: May 2017
      Source:Advanced Powder Technology, Volume 28, Issue 5
      Author(s): V.V. Atuchin, A.K. Subanakov, A.S. Aleksandrovsky, B.G. Bazarov, J.G. Bazarova, S.G. Dorzhieva, T.A. Gavrilova, A.S. Krylov, M.S. Molokeev, A.S. Oreshonkov, A.M. Pugachev, Yu.L. Tushinova, A.P. Yelisseyev
      New noncentrosymmetric rare earth borate Rb3NdB6O12 is found in the ternary system Rb2O–Nd2O3–B2O3. The Rb3NdB6O12 powder was fabricated by solid state synthesis at 1050K for 72h and the crystal structure was obtained by the Rietveld method. Rb3NdB6O12 crystallized in space group R32 with unit cell parameters a =13.5236(4), c =31.162(1)Å, Z =3. From DSC measurements, the reversible phase transition (I type) in Rb3NdB6O12 is observed at 852–936K. The 200μm thick tablet is transparent over the spectral range of 0.3–6.5μm and the band gap is found as E g ∼6.29eV. Nonlinear optical response of Rb3NdB6O12 tested via SHG is estimated to be higher than that of K3YB6O12. Blue shift of Nd luminescent lines is found in comparison with other borates. The vibrational parameters of Rb3NdB6O12 are evaluated by experimental methods.
      Graphical abstract image

      PubDate: 2017-04-25T14:38:22Z
      DOI: 10.1016/j.apt.2017.02.019
       
  • Solvent-free direct formulation of poorly-soluble drugs to amorphous solid
           dispersion via melt-absorption
    • Authors: Shou-Cang Shen; Wai Kiong Ng; Jun Hu; Kumaran Letchmanan; Junwei Ng; Reginald Beng Hee Tan
      Pages: 1316 - 1324
      Abstract: Publication date: May 2017
      Source:Advanced Powder Technology, Volume 28, Issue 5
      Author(s): Shou-Cang Shen, Wai Kiong Ng, Jun Hu, Kumaran Letchmanan, Junwei Ng, Reginald Beng Hee Tan
      To improve the dissolution properties of poorly water soluble active pharmaceutical ingredients (APIs), a solvent-free melt-absorption process was applied to directly load the APIs into mesoporous SBA-15 silica powder as an amorphous solid dispersion. Two model compounds, poorly aqueous soluble ibuprofen (IBU) and fenofibrate (FEN), were individually mixed with SBA-15 powder and heated above their respective melting points. Upon cooling, the physicochemical and solid-state properties of the solid dispersions were investigated by N2 adsorption, DSC, XRD, SEM and solid-state NMR. The molten API was found to be absorbed into the pores, confined within the nano-channels of SBA-15, and re-solidified to an amorphous solid dispersion. Due to the amorphous properties, the APIs showed a significant enhancement in dissolution rate as compared with the untreated crystalline APIs. Although the amorphous forms were not at thermodynamic equilibrium, the APIs exhibited excellent solid-state physical stability even under accelerated stress conditions. In comparison with APIs loaded using a co-spray drying process (previous work), the melt-absorption process required no organic solvent, produced powders with a coarser size distribution and more desirable flow properties. This solvent-free direct melt-absorption process can be used to formulate a wide range of poorly soluble drugs to be amorphous solid dispersions.
      Graphical abstract image

      PubDate: 2017-04-25T14:38:22Z
      DOI: 10.1016/j.apt.2017.02.020
       
  • Low temperature synthesis of Co3O4 and (Co1−xMnx)3O4 spinels
           nanoparticles
    • Authors: F. Giovannelli; V. Marsteau; M. Zaghrioui; C. Autret; F. Delorme
      Pages: 1325 - 1331
      Abstract: Publication date: May 2017
      Source:Advanced Powder Technology, Volume 28, Issue 5
      Author(s): F. Giovannelli, V. Marsteau, M. Zaghrioui, C. Autret, F. Delorme
      The (Co1− x Mn x )3O4 solid solution have been synthesized in water at 60°C by soda addition to a cationic solution. XRD patterns show that spinel oxide has been obtained except for pure cobalt composition which exhibits also the presence of hydroxide and oxy-hydroxide. Therefore, to reach this composition, a different synthesis route has been developed: the cationic solution is added to the soda and for the first time Co3O4 nanoparticles have been synthesized by a direct precipitation in aqueous solution at low temperature. For each composition, the particles are well crystallized and exhibit a size close to 50nm. Each particle is composed by several crystallographic domains of about 10nm. The cubic to tetragonal transition reported in the literature for x =0.46 is observed in between x =0.33 and x =0.50. Raman spectra show that substitution of Co by Mn, in the cubic phase, introduces a random high disorder. In the tetragonal phase, occupation of the octahedral site remains a random occupation, while the tetrahedral site seems to be preferentially occupied by Co ions. All these results show that the precipitation is a simple, fast and safe process to synthesize pure phase of (Co1− x Mn x )3O4 spinel solid solution in aqueous media at low temperature.
      Graphical abstract image

      PubDate: 2017-04-25T14:38:22Z
      DOI: 10.1016/j.apt.2017.02.022
       
  • HEPES-mediated controllable synthesis of hierarchical CuO nanostructures
           and their analogous photo-Fenton and antibacterial performance
    • Authors: Shilei Wang; Qin Li; Fengxi Chen; Jun Ke; Rong Chen
      Pages: 1332 - 1339
      Abstract: Publication date: May 2017
      Source:Advanced Powder Technology, Volume 28, Issue 5
      Author(s): Shilei Wang, Qin Li, Fengxi Chen, Jun Ke, Rong Chen
      Owing to the strongly morphology and size-dependent properties of nanomaterials, developing a simple and eco-friendly approach for controlling synthesis and assembly of hierarchical CuO nanostructures plays a critical role. In this work, we successfully developed an eco-friendly and facile hydrothermal route for controllable synthesis of various morphologies CuO nanostructures, where traditional and toxic additives were replaced by biocompatible 4-(2-hydroxyethyl)-1-piperazineethane-sulfonic acid (HEPES). The growth rate and orientation of CuO nanoparticles were tuned through adjusting the concentration and pH value of HEPES. The XRD pattern, SEM, UV-DRS, and BET indicated CuO nanostructures maintained high purity and excellent crystalline nature and showed more regular morphology and size with enhanced visible light absorption. The analogous photo-Fenton assay demonstrated that the as-prepared CuO nanostructures present enhanced dye removal capability when compared with CuO synthesized in pure water. Furthermore, the antibacterial assay on S. aureus was also investigated, and CuO nanoparticles with smallest size displayed the best antibacterial performance. These results reveal that HEPES shows a remarkable influence on the possible application of as-prepared CuO nanostructures which having great potential in pollutant removal.
      Graphical abstract image

      PubDate: 2017-04-25T14:38:22Z
      DOI: 10.1016/j.apt.2017.03.001
       
  • Cutting process for aluminum foam fabricated by sintering and dissolution
           process
    • Authors: Yoshihiko Hangai; Nguyen Ngoc Minh; Tomoaki Morita; Ryosuke Suzuki; Masaaki Matsubara; Shinji Koyama
      Pages: 1426 - 1429
      Abstract: Publication date: May 2017
      Source:Advanced Powder Technology, Volume 28, Issue 5
      Author(s): Yoshihiko Hangai, Nguyen Ngoc Minh, Tomoaki Morita, Ryosuke Suzuki, Masaaki Matsubara, Shinji Koyama
      In this study, a cutting process using a milling machine for Al foam with and without remaining NaCl fabricated by a sintering and dissolution process was proposed. By comparing the surface pore structures of the Al foam after the cutting process, the possibility of cutting Al foam using a milling machine while retaining its pore structures was investigated. Although some flashes were observed around the pores, most of the pores remained at the cutting surface and retained their shape. Therefore, it was found that Al foam can be cut using a milling machine without fracturing its pore structures at the surface by retaining the NaCl spacers. Namely, NaCl, which was used as spacers to generate pores in Al, can also have the role of strengthening Al foam during the cutting process.
      Graphical abstract image

      PubDate: 2017-04-25T14:38:22Z
      DOI: 10.1016/j.apt.2017.02.021
       
  • Low-temperature ultrasound synthesis of nanocrystals CoTiO3 without a
           calcination step: Effect of ultrasonic waves on formation of the crystal
           growth mechanism
    • Authors: Abdolmajid Moghtada; Ali Shahrouzianfar; Rouholah Ashiri
      Pages: 1109 - 1117
      Abstract: Publication date: April 2017
      Source:Advanced Powder Technology, Volume 28, Issue 4
      Author(s): Abdolmajid Moghtada, Ali Shahrouzianfar, Rouholah Ashiri
      CoTiO3 nanocrystallites with an average diameter of 50nm were synthesized successfully by the sonochemical method without a calcination step and using C10H16N2O8 (EDTA) as the chelating agent. To reach an in-depth understanding of the scientific basis of the proposed process, an in-detail analysis was carried out for characterization of nanoscale CoTiO3 particles via XRD, FTIR, FE-SEM and UV–vis diffuse reflectance spectroscopy (DRS). The crystallite size, average particle size and band gap are found to be 10.7nm, in the range of 50nm and 4.64eV, respectively. The mechanism and the formation process of CoTiO3 in the sonochemical process were proposed. It was found that nanocrystals were formed directly before being oriented and aggregated into large particles in aqueous solution under ultrasonic irradiation. The nucleation in the sonocrystallization process was accelerated by the implosive collapse of bubbles, while the crystal growth process was inhibited or delayed by shock waves and turbulent flow created by ultrasonic radiation. A pure complex perovskite phase of spherical shape was formed completely in a short irradiation time without the calcination process. Sonochemical irradiation could accelerate spherical shape formation of the particles significantly. These results provide new insights into the development and design of better nanomaterial synthesis methods.
      Graphical abstract image

      PubDate: 2017-03-21T11:31:37Z
      DOI: 10.1016/j.apt.2016.11.004
       
  • Nanocrystalline cobalt-oxide powders by solution-combustion synthesis and
           their application in chemical sensors
    • Authors: Katarina Vojisavljević; Susanne Wicker; Inci Can; Andreja Benčan; Nicolae Barsan; Barbara Malič
      Pages: 1118 - 1128
      Abstract: Publication date: April 2017
      Source:Advanced Powder Technology, Volume 28, Issue 4
      Author(s): Katarina Vojisavljević, Susanne Wicker, Inci Can, Andreja Benčan, Nicolae Barsan, Barbara Malič
      The present study demonstrates the relationship between the combustion reaction mechanism induced by the exothermicity of the cobalt nitrate-glycine solution-combustion reactions and morphological details of the nanocrystalline Co3O4. The thermal decomposition pathway and the amount of the heat liberated in combustion are defined by the exothermic reaction between gaseous NH3 and N2O species. A direct evidence that the exothermicity of the combustion reaction plays an important role in formation of the powders with different morphology was obtained from the scanning and transmission electron microscopies. In contrast to stoichiometric reaction, where the short-string Co3O4 particles form hard agglomerates, the energetically softer 50% fuel lean reaction is responsible for weak bonds between Co3O4 particles and formation of the loose cauliflower-like agglomerates. The latter powder with the specific surface area of 64.4m2/g and the average crystallite size of ∼11nm was used for the processing of drop-coated sensors, which showed a superior sensor response toward 20ppm of acetone in 25% r.h. humidity and at low operating temperature of 150°C.
      Graphical abstract image

      PubDate: 2017-03-21T11:31:37Z
      DOI: 10.1016/j.apt.2016.10.029
       
  • Effect of particle size on densification of pure magnesium during spark
           plasma sintering
    • Authors: Yinlong Cheng; Zeqin Cui; Linxin Cheng; Dianqing Gong; Wenxian Wang
      Pages: 1129 - 1135
      Abstract: Publication date: April 2017
      Source:Advanced Powder Technology, Volume 28, Issue 4
      Author(s): Yinlong Cheng, Zeqin Cui, Linxin Cheng, Dianqing Gong, Wenxian Wang
      The effect of particles size ranges (<38μm, 75–150μm, 270–550μm) of atomized magnesium powders on densification mechanisms during spark plasma sintering (SPS) process was investigated. The intrinsic driving force, local pressure and current of Mg powders with different particle sizes were analyzed by theoretical calculation. The results obviously indicate that the densification of pure magnesium can be improved by the reduction of particle size, suggesting the intrinsic driving force, local pressure and current intensity are enhanced significantly by a decrease in the particle size at the same sintering conditions, which can promote shrinkage of pores, formation of the sintering neck and mass transportation in the SPS process. Not only that, rapid densification is also interpreted in term of mechanical movement of particles, Joule heating effect and plastic deformation. However, the mechanical movement of the large particles is higher than that of small particles due to high punch displacement, and plastic deformation, detected by scanning electron microscopy, plays a main role in densification for large particles in the case during the sintering. Joule heating effect is the key factor for densification of small Mg particles, and high densification degree can be obtained by sintering small particles.
      Graphical abstract image

      PubDate: 2017-03-21T11:31:37Z
      DOI: 10.1016/j.apt.2017.01.017
       
  • Synthesis and catalytic performance of antimony trioxide nanoparticles by
           ultrasonic-assisted solid-liquid reaction ball milling
    • Authors: Guosong Han; Ding Chen; Xiaoling Li
      Pages: 1136 - 1140
      Abstract: Publication date: April 2017
      Source:Advanced Powder Technology, Volume 28, Issue 4
      Author(s): Guosong Han, Ding Chen, Xiaoling Li
      In this study, the cubic antimony trioxide (Sb2O3) nanoparticles were successfully synthesized by ultrasonic-assisted solid-liquid reaction ball milling technique. And the synthetic process, using Sb powder as raw material, was conducted with an atmosphere of acetic acid aqueous solution at low temperature (⩽100°C). Some controlled trials, including without the assistance of ultrasonic wave, different reaction solutions and diverse ultrasonic frequencies, were performed. The products were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results show that the Sb2O3 nanoparticles with uniform and ultrafine particle size were obtained within short reaction time under the coaction of both ultrasonic wave and ball milling. Furthermore, the catalytic capacity of the Sb2O3 nanoparticles for decomposition of H2O2 was measured during the oxidative decomposition of methylene blue (MB). The test exhibited rapid and efficient color removal in the degradation of MB.
      Graphical abstract image

      PubDate: 2017-03-21T11:31:37Z
      DOI: 10.1016/j.apt.2017.01.019
       
  • Investigation of drill pipe rotation effect on cutting transport with
           aerated mud using CFD approach
    • Authors: Mostafa Keshavarz Moraveji; Mohammad Sabah; Ahmad Shahryari; Ahmadreza Ghaffarkhah
      Pages: 1141 - 1153
      Abstract: Publication date: April 2017
      Source:Advanced Powder Technology, Volume 28, Issue 4
      Author(s): Mostafa Keshavarz Moraveji, Mohammad Sabah, Ahmad Shahryari, Ahmadreza Ghaffarkhah
      In drilling with aerated mud, appropriate hole cleaning has a great impact on decreasing the drilling time and cost. Thus, investigating the impact of diverse drilling parameters such as pipe rotation on the hole cleaning looks as a key. In this study, the combination of k - ε turbulent model and Eulerian-Eulerian multiphase model was used to investigate the three phase flow in the concentric annulus. Furthermore, the collision of cutting – cutting, cutting-drill pipe and cutting-well was considered in the simulations. In the first step, for validating the computational setup, the simulation outcomes were compared with the previous experimental works. The impact of pipe rotation on hole cleaning at various water and air flow rates, inclination and cutting sizes was scrutinized. The simulation results demonstrated that the impact of pipe rotation on the hole cleaning can be different depending on the different hole conditions. In the low inclination and air rates, rising the pipe rotation from 0 to 75RPM brings about dropping the cutting concentration, but increasing the pipe rotation from 75 to 125RPM comes about raising the cutting concentration. On the other hand, in low inclination and high flow rates of air, rising the pipe rotation causes a high accumulation of cutting. Lastly, at high inclination, the cutting concentration in annulus decreases with increasing the pipe rotation and this is independent of air and water flow rates. The simulation outcomes also showed that the impact of pipe rotation on hole cleaning at large cutting size is not as much as small cutting size.
      Graphical abstract image

      PubDate: 2017-03-21T11:31:37Z
      DOI: 10.1016/j.apt.2017.01.020
       
  • Preparation and characterization of hydroxyapatite synthesized from oyster
           shell powders
    • Authors: Shih-Ching Wu; Hsueh-Chuan Hsu; Shih-Kuang Hsu; Chien-Pei Tseng; Wen-Fu Ho
      Pages: 1154 - 1158
      Abstract: Publication date: April 2017
      Source:Advanced Powder Technology, Volume 28, Issue 4
      Author(s): Shih-Ching Wu, Hsueh-Chuan Hsu, Shih-Kuang Hsu, Chien-Pei Tseng, Wen-Fu Ho
      The ready availability and the low cost of oyster shells, which is composed predominantly of calcium carbonate with rare impurities, along with naturalwastes are attractive features for converting the biological material into hydroxyapatite (HA) powders for biomedical applications. The HA powder was synthesized using oyster shell powders and dicalcium phosphate dihydrate (CaHPO4·2H2O, DCPD) through ball milling and subsequently heat treatment. The HA was initiated through sintering the 1-h milled sample at 1000°C for 1h, while pure HA phase is formed after sintering the 10-h milled sample. The as-prepared samples, obtained after 5 or 10h of milling and then heat-treating at 1000°C for 1h, contain the phase of β-tricalcium phosphate (β-TCP). Moreover, the result of FTIR analysis showed that the as-prepared HA sample is A- and B-type carbonate-containing calcium phosphates. The as-synthesize HA powder containing trace elements Mg and Sr exhibited good crystallinity (96.3%) and high phase-purity.
      Graphical abstract image

      PubDate: 2017-03-21T11:31:37Z
      DOI: 10.1016/j.apt.2017.02.001
       
  • Effect of impeller on sinking and floating behavior of suspending particle
           materials in stirred tank: A computational fluid dynamics and factorial
           design study
    • Authors: Yuan Zhang; Guangren Yu; Muhammad Abdul Hanan Siddhu; Abro Masroor; Muhammad Furqan Ali; Ahmed A. Abdeltawab; Xiaochun Chen
      Pages: 1159 - 1169
      Abstract: Publication date: April 2017
      Source:Advanced Powder Technology, Volume 28, Issue 4
      Author(s): Yuan Zhang, Guangren Yu, Muhammad Abdul Hanan Siddhu, Abro Masroor, Muhammad Furqan Ali, Ahmed A. Abdeltawab, Xiaochun Chen
      The present study focuses upon the effect of the impeller on sinking and floating behavior of suspending particles in stirred tank reactor, employing computational fluid dynamics (CFD) simulation where factorial design is used to investigate the main and interaction effects of design parameters on the particle distribution performance of four typical impeller designs. Factorial design results show the effect of diameter and width of the impeller and off-bottom clearance on sinking particles is different from that of floating particles and regression equations for sinking particles and floating particles are achieved separately. Meanwhile, optimal equations which quantitatively reveal the effect of impeller factors on suspension quality and energy input is established for impeller improvement. Besides the development of computational models, the combination of CFD simulation with factorial design method provides a useful approach to gain insight into the suspension behavior of sinking and floating particles, also it guides to optimize the impeller design.
      Graphical abstract image

      PubDate: 2017-03-21T11:31:37Z
      DOI: 10.1016/j.apt.2017.02.002
       
  • Vitis vinifera peel polyphenols stabilized gold nanoparticles induce
           cytotoxicity and apoptotic cell death in A431 skin cancer cell lines
    • Authors: J. Grace Nirmala; S. Akila; R.T. Narendhirakannan; Suvro Chatterjee
      Pages: 1170 - 1184
      Abstract: Publication date: April 2017
      Source:Advanced Powder Technology, Volume 28, Issue 4
      Author(s): J. Grace Nirmala, S. Akila, R.T. Narendhirakannan, Suvro Chatterjee
      Gold nanoparticles (AuNPs) are considered beneficial in the field of biomedicine and in the development of therapeutic nanomedicine products. In the present study, Vitis vinifera. L (grapes) peel polyphenols were utilized as reducing and stabilizing agents for the biosynthesis of gold nanoparticles, and their cytotoxicity and apoptotic effects were assessed. The synthesized gold nanoparticles were characterized using UV-Visible spectroscopy, Transmission electron microscopy (TEM), X-ray diffraction (XRD), Particle size distribution, Fourier transform infrared spectroscopy (FTIR) and zeta potential analysis. TEM analysis confirmed that the nanoparticles were spherical with ∼20–40nm in size. Particle size distribution revealed ∼50±5nm nanoparticles and FTIR confirmed the presence of polyphenols capped onto the peel gold nanoparticles. The V. vinifera peel gold nanoparticles were studied for their antiproliferative activities and induction of apoptosis at the inhibitory concentration (IC50) of 23.6µM. A431 cell lines incubated with V. vinifera peel gold nanoparticles for 24h exhibited cytotoxicity activity mediated by increased reactive oxygen species (ROS) production, apoptotic morphological changes and loss of membrane potential significantly (p <0.01). Thus, the cytotoxicity of the gold nanoparticles could be attributed to the synergistic effects of the phenolic moieties of the V. vinifera peels and the efficiency of the bioconjugated gold nanoparticles causing apoptosis and secondary necrosis.
      Graphical abstract image

      PubDate: 2017-03-21T11:31:37Z
      DOI: 10.1016/j.apt.2017.02.003
       
  • Mechanistic aspects of formation of MgO nanoparticles under microwave
           irradiation and its catalytic application
    • Authors: Aravind L. Gajengi; Takehiko Sasaki; Bhalchandra M. Bhanage
      Pages: 1185 - 1192
      Abstract: Publication date: April 2017
      Source:Advanced Powder Technology, Volume 28, Issue 4
      Author(s): Aravind L. Gajengi, Takehiko Sasaki, Bhalchandra M. Bhanage
      This work reports a preparation of Mg(OH)2 and MgO nanoparticles (NPs) using magnesium acetate in benzylamine and mechanistic study of its formation. The benzylamine acts as a solvent, base, promoter and capping agent in this reaction. The structure and morphology of particles were analyzed by X-ray diffraction pattern (XRD), transmission electron microscopy (TEM), high resolution TEM (HRTEM), selected area energy dispersion (SAED), energy-dispersive X-ray spectroscopy (EDAX), thermogravimetric analysis (TGA), FT-IR, CO2–temperature programmed desorption (TPD), X-ray photoelectron spectroscopy (XPS) and Brunauer–Emmett–Teller (BET) surface area analysis techniques. The application of as prepared MgO NPs was used in catalysis as a catalyst for the formylation of amines with recyclability studies of nanocatalyst.
      Graphical abstract image

      PubDate: 2017-03-21T11:31:37Z
      DOI: 10.1016/j.apt.2017.02.004
       
  • Modeling filtration performance of elliptical fibers with random
           distributions
    • Authors: Xinming Jin; Lijun Yang; Xiaoze Du; Yongping Yang
      Pages: 1193 - 1201
      Abstract: Publication date: April 2017
      Source:Advanced Powder Technology, Volume 28, Issue 4
      Author(s): Xinming Jin, Lijun Yang, Xiaoze Du, Yongping Yang
      The fibrous media with elliptical cross sections may improve the filtration performance, however, current researches mainly focus on the capture mechanisms of a single elliptical fiber, and the fibrous media with randomly distributed fibers are rarely involved. In this work, a 2D numerical model was developed to predict the pressure drop and particle penetration for the fibrous filter composed of randomly distributed elliptical fibers. The results show that a big solid volume fraction of filter increases the effective collision area, and enhances the capture at a low face velocity. The particle penetrations through the fibers with the diameter of 5μm are conspicuously weaker than those with the diameter of 10μm, especially at big solid volume fractions and high face velocities. The blunt elliptical fibers restrain the penetration more effectively than the circle ones when the solid volume fraction is high. Though the blunt fibers lead to a large drag force, the increased pressure drop cannot improve the filtration performance at low solid volume fractions. In most cases, the slim elliptical fibers can enhance the filtration performance. A bigger aspect ratio of elliptical fibers leads to a low quality factor, showing the capture efficiency increases with the penalty of a high pressure drop.
      Graphical abstract image

      PubDate: 2017-03-21T11:31:37Z
      DOI: 10.1016/j.apt.2017.02.005
       
  • Joint mechanical activation of MnO2, Fe2O3 and graphite: Mutual influence
           on the structure
    • Authors: G. Kozhina; S. Estemirova; N. Pechishcheva; A. Murzakaev; E. Vovkotrub; M. Skrylnik; K. Shunyaev
      Pages: 1202 - 1212
      Abstract: Publication date: April 2017
      Source:Advanced Powder Technology, Volume 28, Issue 4
      Author(s): G. Kozhina, S. Estemirova, N. Pechishcheva, A. Murzakaev, E. Vovkotrub, M. Skrylnik, K. Shunyaev
      The structural changes of MnO2, Fe2O3 and graphite under separate and joint mechanical activation in high-energy planetary ball mill were studied by X-ray diffraction analysis, Raman spectroscopy and chemical analysis. Separate mechanical processing resulted in nanostructured states of MnO2, Fe2O3 and graphite with the size of coherent scattering regions of 25, 12 and 6nm, respectively, and the average particle size of 15–20nm. Along with nanoparticles of globular shape, Fe2O3 nanorods were found to be formed during separate milling. No mechanochemical effect was found after separate milling. Under joint mechanical activation of nanostructured manganese and iron oxides with graphite, phase transformations toward less stable forms of oxides (Mn2O3, Mn3O4, Fe3O4) were found. When co-milled with α-Fe2O3, graphite was found to exfoliate to graphene layers. The graphite phase remained under the combined mechanical activation with MnO2. Dynamic recrystallization of α-Fe2O3 phase also proceeded during joint mechanical activation of nanostructured Fe2O3 and graphite.
      Graphical abstract image

      PubDate: 2017-03-21T11:31:37Z
      DOI: 10.1016/j.apt.2017.02.006
       
  • Visible light response and superior dispersed S-doped TiO2 nanoparticles
           synthesized via ionic liquid
    • Authors: Xiaoyun Chen; Dong-Hau Kuo; Dongfang Lu
      Pages: 1213 - 1220
      Abstract: Publication date: April 2017
      Source:Advanced Powder Technology, Volume 28, Issue 4
      Author(s): Xiaoyun Chen, Dong-Hau Kuo, Dongfang Lu
      Visible light response and superior dispersed S6+-doped TiO2 nanoparticle catalysts (S-TiO2) were prepared via ionic liquid of 1-butyl-3-methylimidazolium hexafluorophosphate. The phenol was used for the evaluation of the S-TiO2 photocatalytic activity. S-TiO2 was characterized by XPS, UV–vis DRS, FE-SEM, TEM, XRD, TG/DSC, FTIR, and BET. The results showed that S-TiO2 with appropriate S doping prepared via ionic liquid had smaller particle size, better dispersion, higher activity, and higher surface area (S BET) than that prepared in water. Cationic S6+ incorporation into TiO2 lattice substitutes for Ti4+ lattice site, generates Ti–O–S bonds in TiO2, and leads to the formation of donor defect levels in band gap, so that the photocatalytic sensitization of TiO2 has been extended to visible light region. The optimal content in S doping for the better photocatalytic performance can optimize electrical properties of the intrinsic n-type TiO2 by adding the adequate amount of donor defect of STi 2+ for considering the lifetime of the photo-induced charge pairs.
      Graphical abstract image

      PubDate: 2017-03-21T11:31:37Z
      DOI: 10.1016/j.apt.2017.02.007
       
  • Processing conditions for the production of polystyrene microcapsules
           containing demineralized water
    • Authors: Marcelo Natan Martins; Evaldo Toniolo Kubaski; Thiago Sequinel; Sergio Cava; Mario Lúcio Moreira; Sergio Mazurek Tebcherani
      Pages: 1221 - 1227
      Abstract: Publication date: April 2017
      Source:Advanced Powder Technology, Volume 28, Issue 4
      Author(s): Marcelo Natan Martins, Evaldo Toniolo Kubaski, Thiago Sequinel, Sergio Cava, Mario Lúcio Moreira, Sergio Mazurek Tebcherani
      Microencapsulation has been important for engineering, biology, medicine, and several other fields of science. Microencapsulation is an effective way to protect the encapsulated material (e.g. an aqueous solution or pharmaceutical drug) and control its release to the external environment. Microcapsules are also used for producing anticorrosion systems and, in this case, studies about polymeric microcapsules containing acid solutions are relevant. In this paper, polystyrene microcapsules containing demineralized water were produced. The influence of the core-to-shell ratio, evaporation temperature, and the presence of sodium chloride and a surfactant on the yield of the microencapsulation process was evaluated. Microcapsules were characterized by scanning electron microscopy (SEM), and thermogravimetry that revealed the morphology and thermal behavior of microcapsules in response to changing core-to-shell ratios. SEM images showed mononuclear microcapsules with smooth surfaces. The results indicated that a core-to-shell ratio of 2:1 showed the best encapsulation performance under the conditions of this study. An increase in yield of about 38% was achieved by reducing the evaporation temperature. In addition, the yields obtained in this research are considerably higher than those found in literature.
      Graphical abstract image

      PubDate: 2017-03-21T11:31:37Z
      DOI: 10.1016/j.apt.2017.02.008
       
  • Inside Front Cover (Aims &amp; Scope, Editors)
    • Abstract: Publication date: May 2017
      Source:Advanced Powder Technology, Volume 28, Issue 5


      PubDate: 2017-04-25T14:38:22Z
       
  • Full title (Editorial Board Members)
    • Abstract: Publication date: May 2017
      Source:Advanced Powder Technology, Volume 28, Issue 5


      PubDate: 2017-04-25T14:38:22Z
       
  • Physical and optical properties of HfO2 NPs – Synthesis and
           characterization in finding its feasibility in opto-electronic devices
    • Authors: J. Manikantan; H.B. Ramalingam; B. Chandar Shekar; B. Murugan; R. Ranjith Kumar; J. Sai Santhoshi
      Abstract: Publication date: Available online 25 April 2017
      Source:Advanced Powder Technology
      Author(s): J. Manikantan, H.B. Ramalingam, B. Chandar Shekar, B. Murugan, R. Ranjith Kumar, J. Sai Santhoshi
      HfO2 nanoparticles (HfO2 NPs) with different precursors (NaOH, H2O, ethanol) were synthesized by a simple co-precipitation method. FTIR and EDX spectroscopy analysis shows the Stoichiometries composition of HfO2 NPs. X-ray diffraction pattern analysis revealed that the as prepared and calcined HfO2 NPs are respectively amorphous and polycrystalline nature. TEM analysis confirms that the morphology of the calcined HfO2 NPs is spherical in shape with less agglomeration. The crystallite size was evaluated to be 51nm, 37nm and 30nm respectively, for the precursors NaOH, H2O and ethanol used for HfO2 NPs. SEM analysis shows spherical, rock and sponge like surface morphology respectively, for the precursors NaOH, H2O and ethanol used for HfO2 NPs. UV–visible spectroscopy analysis revealed that the optical band gap energy of NaOH, H2O and ethanol precursors used HfO2 NPs were respectively 5.50eV, 5.52eV and 5.50eV. The observed optical properties indicated the feasibility of utilizing these NPs as anti reflection layers in solar cells and for the construction of poultry farms to save energy. The estimated dielectric constant value indicated that these NPs could be used to prepare dielectric layers in thin film transistor.
      Graphical abstract image

      PubDate: 2017-04-25T14:38:22Z
      DOI: 10.1016/j.apt.2017.03.022
       
  • Numerical analysis of conjugate natural and mixed convection heat transfer
           of nanofluids in a square cavity using the two-phase method
    • Authors: Faroogh Garoosi; Farhad Talebi
      Abstract: Publication date: Available online 23 April 2017
      Source:Advanced Powder Technology
      Author(s): Faroogh Garoosi, Farhad Talebi
      In the present study, the problem of conjugate natural and mixed convection of nanofluid in a square cavity containing several pairs of hot and cold cylinders is visualized using non-homogenous two-phase Buongiorno's model. Such configuration is considered as a model of heat exchangers in order to prevent the fluids contained in the pipelines from freezing or condensing. Water-based nanofluids with Cu, Al2O3, and TiO2 nanoparticles at different diameters ( 25 nm ⩽ d p ⩽ 145 nm ) are chosen for investigation. The governing equations together with the specified boundary conditions are solved numerically using the finite volume method based on the SIMPLE algorithm over a wide range of Rayleigh number ( 10 4 ⩽ Ra ⩽ 10 7 ), Richardson number ( 10 - 2 ⩽ Ri ⩽ 10 2 ) and nanoparticle volume fractions ( 0 ⩽ φ ⩽ 5 % ). Furthermore, the effects of three types of influential factors such as: orientation of conductive wall, thermal conductivity ratio ( 0.2 ⩽ K r ⩽ 25 ) and conductive obstacles on the fluid flow and heat transfer rate are also investigated. It is found that the heat transfer rate is significantly enhanced by incrementing Rayleigh number and thermal conductivity ratio. It is also observed that at all Rayleigh numbers, the total Nusselt number rises and then reduces with increasing the nanoparticle volume fractions so that there is an optimal volume fraction of the nanoparticles where the heat transfer rate within the enclosure has a maximum value. Finally, the results reveal that by increasing the thermal conductivity of the nanoparticles and Rayleigh number, distribution of solid particles becomes uniform.
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      PubDate: 2017-04-25T14:38:22Z
      DOI: 10.1016/j.apt.2017.04.006
       
  • Base fluids with CNTs as nanoparticles through non-Darcy porous medium in
           convectively heated flow: A comparative study
    • Authors: T. Hayat; Zakir Hussain; B. Ahmed; A. Alsaedi
      Abstract: Publication date: Available online 19 April 2017
      Source:Advanced Powder Technology
      Author(s): T. Hayat, Zakir Hussain, B. Ahmed, A. Alsaedi
      Comparative analysis for flow of CNTs nanofluids is discoursed in the presence of non-Darcy porous medium. The consequences of homogeneous/heterogeneous process and heat transfer through convection are employed. The flow induced is due to non-linear stretching sheet of variable thickness. The bottom of the variable thickness sheet is heated by convective processes from a heated fluid. The velocity, temperature and concentration functions are formulated for the stretched flow problem. Convergence control variables and square residual errors for series solutions are obtained through OHAM (Optimal Homotopy Analysis Method). Biot number corresponds to larger temperature distribution in case of MWCNT than SWCNT. Comparison of nanoparicles SWCNT and MWCNT for the CNTs nanofluid fluids is highlighted. Water and engine oil CNTs fluids have higher magnitude of Nusselt number when compared with kerosene oil CNT fluid. The heat transfer rate in the presence of MWCNT is higher than SWCNT. Comparison of present study with previous published data is made. The outcomes are found in favorable agreement.
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      PubDate: 2017-04-25T14:38:22Z
      DOI: 10.1016/j.apt.2017.04.003
       
  • Particle size distribution control and related properties improvements of
           tungsten powders by fluidized bed jet milling
    • Authors: Rui Li; Mingli Qin; Chengcheng Liu; Zheng Chen; Xuanli Wang; Xuanhui Qu
      Abstract: Publication date: Available online 18 April 2017
      Source:Advanced Powder Technology
      Author(s): Rui Li, Mingli Qin, Chengcheng Liu, Zheng Chen, Xuanli Wang, Xuanhui Qu
      Fine grinding process of different particle size tungsten powders was carried out by fluidized bed jet milling. The results showed that the jet milling treatment caused deagglomeration of tungsten powders, which led to particles sufficient dispersion and narrow particle size distribution. Grinding gas pressure of 0.70Mpa made the particles achieve high speed which promoted the particles collision contributing to particle dispersion and shape modification. For tungsten powder with particle size of 3μmFSSS, a higher packing density with 5.54g/cm3 was obtained, compared with the 3.71g/cm3 of the original powder. For tungsten powder with particle size of 1μmFSSS, the big agglomerates disappeared and the particle size distribution become narrower, while small aggregates about 2–3μm still exist after the jet milling process. For tungsten powder with particle size of 5μm and 10μmFSSS, different medium diameter particle size and narrow particle size distribution of monodisperse tungsten powders can be produced by the optimized jet milling parameters. More important, the effective dispersion, favorable shape modification and precise classification have been achieved in the simple process.
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      PubDate: 2017-04-25T14:38:22Z
      DOI: 10.1016/j.apt.2017.04.002
       
  • Numerical simulation of flow behavior of particles in a liquid-solid
           stirred vessel with baffles
    • Authors: Shuyan Wang; Xiaoxue Jiang; Ruichen Wang; Xu Wang; Shanwen Yang; Jian Zhao; Yang Liu
      Abstract: Publication date: Available online 18 April 2017
      Source:Advanced Powder Technology
      Author(s): Shuyan Wang, Xiaoxue Jiang, Ruichen Wang, Xu Wang, Shanwen Yang, Jian Zhao, Yang Liu
      Flow behavior of particles is simulated by means of two-fluid model combining with kinetic theory of granular flow in a liquid-solid stirred vessel with baffles. The Huilin-Gidaspow drag model is used to obtain interphase interaction of liquid and solids phases. The virtual mass force is considered in simulations. The moving reference frame is applied to the rotation of numerical domain. Predictions are compared with experimental data measured by Pianko-Oprych et al. (2009) in a liquid-solid stirred vessel. This comparison shows that the present model can capture the liquid-solid flow in a liquid-solid stirred vessel. The distributions of velocity and solids volume fraction are predicted at the different heights. The effects of particle density on flow behavior of particles are generally scarce using CFD. Simulations indicate the stirred vessel consists of three regions based on distributions of velocity and turbulent kinetic energy, they are blade circulation region, conical induced region and near-wall region. As an increasing of the impeller speed, the turbulence kinetic and solids phase velocity rise, and the particles fluctuation is intensified.
      Graphical abstract image

      PubDate: 2017-04-25T14:38:22Z
      DOI: 10.1016/j.apt.2017.04.004
       
  • Urea decomposition enhancing the hydrothermal synthesis of lithium iron
           phosphate powders: Effect of the lithium precursor
    • Authors: L.J. Vasquez-Elizondo; J.C. Rendón-Ángeles; Z. Matamoros-Veloza; J. López-Cuevas; K. Yanagisawa
      Abstract: Publication date: Available online 13 April 2017
      Source:Advanced Powder Technology
      Author(s): L.J. Vasquez-Elizondo, J.C. Rendón-Ángeles, Z. Matamoros-Veloza, J. López-Cuevas, K. Yanagisawa
      The synthesis of LiFePO4 (hereafter referred as LFP) using urea as a reducing agent under hydrothermal conditions was investigated. The synthesis was carried out by varying the temperature (150–200°C), at different times from 6 to 24h, and using different precursors of Li ions (LiCl, LiNO3, LiOH, and Li2SO4), to determine the effect of these parameters on the crystallization process of the reaction products. These were characterized by XRD, FT-IR, and FE-SEM. The results showed that the differences in the lattice parameters calculated by Rietveld refinement are affected by the synthesis temperature. In addition, the crystallization of single-phase LiFePO4 powders was achieved by the urea decomposition that occurred at reaction times longer than 12h and at moderate temperatures (170–180°C). The crystallization of LFP particles was promoted by a dissolution-precipitation mechanism, but it was not conducted in a single step, because intermediate secondary phases were produced at reaction intervals below 6h. A crystal growth stage involving the dissolution-crystallization of intermediate secondary phases led to the formation of large particle agglomerates of LiFePO4 exhibiting a flower-like morphology when the synthesis was carried out using Li2SO4. When LiCl, LiOH, and LiNO3 were used, large bulky agglomerates were obtained.
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      PubDate: 2017-04-18T07:46:43Z
      DOI: 10.1016/j.apt.2017.03.031
       
  • An efficient and robust heterogeneous mesoporous montmorillonite clay
           catalyst for the Biginelli type reactions
    • Authors: Ankana Phukan; Subrat Jyoti Borah; Priyanku Bordoloi; Kiran Sharma; Bibek Jyoti Borah; Podma Pollov Sarmah; Dipak Kumar Dutta
      Abstract: Publication date: Available online 12 April 2017
      Source:Advanced Powder Technology
      Author(s): Ankana Phukan, Subrat Jyoti Borah, Priyanku Bordoloi, Kiran Sharma, Bibek Jyoti Borah, Podma Pollov Sarmah, Dipak Kumar Dutta
      Three component coupling reactions of aldehyde, β-ketoester (or β-diketone) and urea (or substituted urea) were carried out by using acid activated montmorillonite clay (AT-Mont.) catalyst having surface area about 400m2/g for the facile synthesis of 3,4-dihydropyrimidin-2(1H)-ones via the Biginelli reactions under mild reaction conditions. The activation of montmorillonite clay was carried out with HCl under controlled conditions for generating nanopores (size 2–7nm) into the matrix. This porous catalyst has promising feature for Biginelli reaction such as easy removal of the catalyst, short reaction time, high yield with 100% selectivity and easy workup procedure. Powder XRD, SEM-EDX, N2 adsorption, pyridine adsorbed FT-IR and TPD analysis were carried out to characterize the solid porous AT-Mont. The catalysts can be recycled and reused several times without significant loss of their catalytic activity.
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      PubDate: 2017-04-18T07:46:43Z
      DOI: 10.1016/j.apt.2017.03.030
       
  • Oxygen adsorption and desorption characteristics of LSCF5582 membranes for
           oxygen separation applications
    • Authors: Khadijeh Paymooni; Elham Doroodchi; Behdad Moghtaderi
      Abstract: Publication date: Available online 12 April 2017
      Source:Advanced Powder Technology
      Author(s): Khadijeh Paymooni, Elham Doroodchi, Behdad Moghtaderi
      This study examines the oxygen adsorption and desorption characteristics of La0.5Sr0.5Co0.8Fe0.2O3−δ (LSCF5582) membranes prepared at sintering temperatures of 1200–1300°C, with the aim of gaining an insight into their performance in the surface reaction limited regime for oxygen separation applications. The findings of this work are then compared with our experimental data on Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF5582) membranes. It is demonstrated that the adsorption rate constants of both membranes are two orders of magnitude greater than their respective oxygen desorption rate constants as the oxygen adsorption occurs in less than 24s whilst the oxygen desorption takes approximately one hour to reach equilibrium. The activation energy for oxygen adsorption of LSCF5582 reduced to a quarter of its value with increasing the sintering temperature from 1200°C to 1300°C. This is attributed to the oxygen exchange occurring more rapidly along the grain boundaries resulting in a lower activation energy. The LSCF5582 grain sintered at 1200°C is the optimum selection for oxygen separation applications at an operating temperature of 850°C and oxygen partial pressure of 0.21bar.
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      PubDate: 2017-04-18T07:46:43Z
      DOI: 10.1016/j.apt.2017.03.024
       
  • Free convection of water–Fe3O4 nanofluid in an inclined cavity subjected
           to a magnetic field: CFD modeling, sensitivity analysis
    • Authors: Neshat Rahimpour; Mostafa Keshavarz Moraveji
      Abstract: Publication date: Available online 12 April 2017
      Source:Advanced Powder Technology
      Author(s): Neshat Rahimpour, Mostafa Keshavarz Moraveji
      Modeling of natural convection heat transfer in an inclined C-shape cavity is studied in this paper. The enclosure is filled with H2O-Fe3O4 nanofluid under the effect of magnetic field. The operating range of parameters used in this study were Hartmann number (Ha) from 0 to 80, Rayleigh number (Ra) from 1E2 to 1E6, nanoparticles volume fraction (φ) from 0 to 0.1, inclination angle (α) from 0 to 90deg, and aspect ratio (AR) from 0.2 to 0.8. The employed model is solved using CFD tools based on the finite element method. The comparison with reference experimental data indicated the accuracy and generalization capability of the model. In addition, a novel correlation and an artificial neural network (ANN) model were productively developed for predicting Nu number as a function of aforementioned independent variables. The influence of the model parameters on the Nu number is precisely presented and discussed. It is shown that Ra number and aspect ratio have more impact on Nu than the other variables.
      Graphical abstract image

      PubDate: 2017-04-18T07:46:43Z
      DOI: 10.1016/j.apt.2017.03.029
       
  • Effect of TiB2 content on the characteristics of spark plasma sintered
           Ti–TiBw composites
    • Authors: Abbas Sabahi Namini; Maziyar Azadbeh; Mehdi Shahedi Asl
      Abstract: Publication date: Available online 9 April 2017
      Source:Advanced Powder Technology
      Author(s): Abbas Sabahi Namini, Maziyar Azadbeh, Mehdi Shahedi Asl
      Spark plasma sintering (SPS) was employed to fabricate monolithic titanium and in-situ formed TiB whisker (TiBw) reinforced titanium matrix composites (TMCs) by adding different amounts of TiB2 as boron source. The sintering process was completed at 1050°C for 5min under 50MPa. The influences of TiB2 content (0.6–9.6wt%) on microstructural evolution and mechanical properties of TMCs were investigated. Thermodynamics, XRD analysis and microstructural investigations confirmed the in-situ formation of TiBw in the composite samples. However, some semi-reacted TiB2 phases, surrounded by TiB coronas, were remained in the microstructure due to the unfinished chemical reaction between the components during a short-time sintering process. The results showed that all samples were appropriately densified by SPS process into the almost dense parts with relative density no less than 97.5%. While bending strength decreased and hardness increased with increasing TiB2 content, the sample with 4.8wt% TiB2 had the maximum tensile strength. Fractographical assessments showed that the addition of TiB2 hindered the grain growth of titanium matrix. With increasing TiB2 content, fracture mode changed from a multiple pattern to a predominantly transgranular and brittle state.
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      PubDate: 2017-04-11T07:41:14Z
      DOI: 10.1016/j.apt.2017.03.028
       
  • Size and shape distributions of primary crystallites in titania aggregates
    • Authors: Eric A. Grulke; Kazuhiro Yamamoto; Kazuhiro Kumagai; Ines Häusler; Werner Österle; Erik Ortel; Vasile-Dan Hodoroaba; Scott C. Brown; Christopher Chan; Jiwen Zheng; Kenji Yamamoto; Kouji Yashiki; Nam Woong Song; Young Heon Kim; Aleksandr B. Stefaniak; D. Schwegler-Berry; Victoria A. Coleman; Åsa K. Jämting; Jan Herrmann; Toru Arakawa; Woodrow W. Burchett; Joshua W. Lambert; Arnold J. Stromberg
      Abstract: Publication date: Available online 9 April 2017
      Source:Advanced Powder Technology
      Author(s): Eric A. Grulke, Kazuhiro Yamamoto, Kazuhiro Kumagai, Ines Häusler, Werner Österle, Erik Ortel, Vasile-Dan Hodoroaba, Scott C. Brown, Christopher Chan, Jiwen Zheng, Kenji Yamamoto, Kouji Yashiki, Nam Woong Song, Young Heon Kim, Aleksandr B. Stefaniak, D. Schwegler-Berry, Victoria A. Coleman, Åsa K. Jämting, Jan Herrmann, Toru Arakawa, Woodrow W. Burchett, Joshua W. Lambert, Arnold J. Stromberg
      The primary crystallite size of titania powder relates to its properties in a number of applications. Transmission electron microscopy was used in this interlaboratory comparison (ILC) to measure primary crystallite size and shape distributions for a commercial aggregated titania powder. Data of four size descriptors and two shape descriptors were evaluated across nine laboratories. Data repeatability and reproducibility was evaluated by analysis of variance. One-third of the laboratory pairs had similar size descriptor data, but 83% of the pairs had similar aspect ratio data. Scale descriptor distributions were generally unimodal and were well-described by lognormal reference models. Shape descriptor distributions were multi-modal but data visualization plots demonstrated that the Weibull distribution was preferred to the normal distribution. For the equivalent circular diameter size descriptor, measurement uncertainties of the lognormal distribution scale and width parameters were 9.5% and 22%, respectively. For the aspect ratio shape descriptor, the measurement uncertainties of the Weibull distribution scale and width parameters were 7.0% and 26%, respectively. Both measurement uncertainty estimates and data visualizations should be used to analyze size and shape distributions of particles on the nanoscale.
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      PubDate: 2017-04-11T07:41:14Z
      DOI: 10.1016/j.apt.2017.03.027
       
  • Development and tableting of directly compressible powder from electrospun
           nanofibrous amorphous solid dispersion
    • Authors: B. Démuth; A. Farkas; B. Szabó; A. Balogh; B. Nagy; E. Vágó; T. Vigh; A.P. Tinke; Z. Kazsu; Á. Demeter; J. Bertels; J. Mensch; A. Van Dijck; G. Verreck; I. Van Assche; G. Marosi; Z.K. Nagy
      Abstract: Publication date: Available online 9 April 2017
      Source:Advanced Powder Technology
      Author(s): B. Démuth, A. Farkas, B. Szabó, A. Balogh, B. Nagy, E. Vágó, T. Vigh, A.P. Tinke, Z. Kazsu, Á. Demeter, J. Bertels, J. Mensch, A. Van Dijck, G. Verreck, I. Van Assche, G. Marosi, Z.K. Nagy
      This work was carried out to explore the unknown area of converting non-woven fibres, prepared by high speed electrospinning, into a directly compressible blend by mixing with excipients. An experimental design, with independent variables of compression force and fillers fraction, was realized to investigate tabletability of electrospun material (EM) and to produce hard tablets with appropriate disintegration time. The models proved to be adequate; fitted to the results and predicted values well for the optimal tablet, which was found to be at 76.25% fillers fraction and 6kN compression force. Besides standard characterizations, distribution of EM was investigated by Raman mapping and scanning electron microscopy revealing the propensity of EM to cover the surface of microcrystalline cellulose and not of mannitol. These analytical tools were also found to be useful at investigating the possible formation of the so-called gelling polymer network in tablets. Scanning electron microscopic pictures of tablets confirmed the maintenance of fibrous structure after compression. The moisture absorption of EM under increasing humidity was studied by dynamic vapour sorption measurement, which suggested good physical stability at 25°C and 60% relative humidity (corroborated by modulated DSC). These results demonstrate the feasibility of a pharmaceutically acceptable downstream processing for EMs.
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      PubDate: 2017-04-11T07:41:14Z
      DOI: 10.1016/j.apt.2017.03.026
       
  • Entropy generation on MHD flow and convective heat transfer in a porous
           medium of exponentially stretching surface saturated by nanofluids
    • Authors: G.C. Shit; R. Haldar; S. Mandal
      Abstract: Publication date: Available online 7 April 2017
      Source:Advanced Powder Technology
      Author(s): G.C. Shit, R. Haldar, S. Mandal
      This paper examines the unsteady boundary layer magnetohydrodynamic flow and convective heat transfer of an exponentially stretching surface saturated by nanofluids in the presence of thermal radiation. The combined effect of stratifications (thermal and concentration) in the unsteady boundary layer flow past over a stretching surface embedded in a porous medium is analyzed. The system of coupled nonlinear differential equations are solved numerically by developing finite difference scheme together with the Newton’s linearization technique, which allows us to control nonlinear terms smoothly. The study shows that the thermal boundary layer thickness significantly increases with the increase of Brownian motion, thermophoresis number and magnetic field strength. The unsteadiness behavior of the flow of nanofluid has reducing effect on both momentum and thermal boundary layer thickness. The Brownian motion has controlling effect on nanoparticle migration. The entropy generation by means of Bejan number has strong impact on the applied magnetic field, dissipation of energy, thermal radiation and Biot number.
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      PubDate: 2017-04-11T07:41:14Z
      DOI: 10.1016/j.apt.2017.03.023
       
  • Novel magnetically separable g-C3N4/Fe3O4/Ag3PO4/Co3O4 nanocomposites:
           Visible-light-driven photocatalysts with highly enhanced activity
    • Authors: Mitra Mousavi; Aziz Habibi-Yangjeh
      Abstract: Publication date: Available online 6 April 2017
      Source:Advanced Powder Technology
      Author(s): Mitra Mousavi, Aziz Habibi-Yangjeh
      In this study, a series of novel quaternary g-C3N4/Fe3O4/Ag3PO4/Co3O4 nanocomposites were fabricated. The prepared nanocomposites were characterized by XRD, EDX, SEM, TEM, UV-DRS, FT-IR, PL, TG, and VSM methods to gain insight about structure, purity, morphology, optical, thermal, and magnetic properties. Photocatalytic activity of the samples was investigated under visible-light irradiation by degradations of rhodamine B, methylene blue, methyl orange, and phenol as four organic pollutants. The highest photocatalytic degradation efficiency was observed when the sample calcined at 300°C for 2h with 20wt% of Co3O4. The photocatalytic activity of this nanocomposite is almost 16.8, 15.7, 4.6, and 5.1 times higher than those of the g-C3N4, g-C3N4/Fe3O4, g-C3N4/Fe3O4/Ag3PO4 (20%), and g-C3N4/Fe3O4/Co3O4 (20%) samples in photodegradation of rhodamine B, respectively. Finally, on the basis of the energy band positions, the mechanism of enhanced photocatalytic activity was discussed.
      Graphical abstract image

      PubDate: 2017-04-11T07:41:14Z
      DOI: 10.1016/j.apt.2017.03.025
       
  • Lattice Boltzmann simulation of flow past a non-spherical particle
    • Authors: Yanjun Guan; Rodrigo Guadarrama-Lara; Xiaodong Jia; Kai Zhang; Dongsheng Wen
      Abstract: Publication date: Available online 4 April 2017
      Source:Advanced Powder Technology
      Author(s): Yanjun Guan, Rodrigo Guadarrama-Lara, Xiaodong Jia, Kai Zhang, Dongsheng Wen
      Lattice Boltzmann method was used to predict the fluid-particle interaction for arbitrary shaped particles. In order to validate the reliability of the present approach, simulation of flow past a single stationary spherical, cylindrical or cubic particle is conducted in a wide range of Reynolds number (0.1< Rep <3000). The results indicate that the drag coefficient is closely related to the particle shape, especially at high Reynolds numbers. The voxel resolution of spherical particle plays a key role in accurately predicting the drag coefficient at high Reynolds numbers. For non-spherical particles, the drag coefficient is more influenced by the particle morphology at moderate or high Reynolds numbers than at low ones. The inclination angle has an important impact on the pressure drag force due to the change of projected area. The simulated drag coefficient agrees well with the experimental data or empirical correlation for both spherical and non-spherical particles.
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      PubDate: 2017-04-11T07:41:14Z
      DOI: 10.1016/j.apt.2017.03.018
       
  • An experimental study of ash particles adhesion force in flue gas
    • Authors: Yuetao Shi; Zhihao Ma; Da Chu; Xiaojuan Wang; Fengzhong Sun; Zhixiong Guo
      Abstract: Publication date: Available online 4 April 2017
      Source:Advanced Powder Technology
      Author(s): Yuetao Shi, Zhihao Ma, Da Chu, Xiaojuan Wang, Fengzhong Sun, Zhixiong Guo
      In this study, experiments and analyses have been carried out to investigate the influences of denitrification and flue gas Waste Heat Recovery Systems (WHRS) on ash particles adhesion force. With use of a denitrification system, it is found that the ash particles adhesion force is strongly influenced by the mass ratio, R, of (NH4)HSO4 to ash. Three influencing zones are identified, i.e., little effect zone (R <1:150), intermediate effect zone (1:150< R <1:60), and huge effect zone (R >1:60). It is necessary to operate in the little effect zone in order to avoid ash deposition in the air preheater. With use of a WHRS, it is found that the ash adhesion force is strongly affected by the flue gas temperature in comparison with the Engineering Acid Dew Temperature (EADT). With decreasing temperature below the EADT, both the collected ash amount and ash adhesion force rise, and the detected particles size increases, indicating particle accumulation that improves ash collection efficiency.
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      PubDate: 2017-04-04T07:34:38Z
      DOI: 10.1016/j.apt.2017.03.010
       
  • Sol-gel synthesis, structural and enhanced photocatalytic performance of
           Al doped ZnO nanoparticles
    • Authors: Reza Mahdavi; S. Siamak Ashraf Talesh
      Abstract: Publication date: Available online 27 March 2017
      Source:Advanced Powder Technology
      Author(s): Reza Mahdavi, S. Siamak Ashraf Talesh
      In this research ZnO and Zn1− x Al x O (x =1, 3, 5, 7%mol) nanoparticles were synthesized by sol-gel method. The effect of Al concentration on the structure, morphology, absorption spectra and photocatalytic properties investigated by using X-ray, TEM, EDS and UV–Vis spectrophotometer approaches. Hexagonal, spherical and rod-like structure was achieved as the dominant structure for undoped nanoparticles, low and high concentrations of doped Al, respectively. Photocatalytic activity of nanoparticles was measured by degradation of methyl orange as a pollutant under radiation of ultraviolet (UV). The experimental test results indicate that the best photocatalytic performance is at of 5% of Al. Furthermore, the doped ZnO nanoparticles have more activity in visible area compared with undoped nanoparticles. The absorption amount in this area increases by raising the Al concentrations. Furthermore, the band gap of the particles decreases from 3.22eV to 2.93eV by increasing Al percentage.
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      PubDate: 2017-03-28T12:00:38Z
      DOI: 10.1016/j.apt.2017.03.014
       
  • Synthesis and characterization of sulfur/carbon/porous nanostructured V2O5
           composite cathodes for lithium sulfur batteries
    • Authors: Long Kong; Izumi Taniguchi
      Abstract: Publication date: Available online 27 March 2017
      Source:Advanced Powder Technology
      Author(s): Long Kong, Izumi Taniguchi
      Porous nanostructured V2O5 (PN-V2O5) was prepared by a facile spray pyrolysis and used as additive to synthesize sulfur/carbon/PN-V2O5 (S/C/PN-V2O5) composite by a combination of wet-ball-milling and heat treatment. The meso- and macropores in PN-V2O5 were confirmed by pore size distribution, which provided the favorable space to accommodate sulfur. The X-ray diffraction analysis showed that the crystal structures of S and V2O5 could be preserved below the heating temperature of 160°C and that high heating temperature (200°C) will result in reaction between S and V2O5. The pore size distribution curves of S/C/PN-V2O5 composites revealed that the penetrated S in PN-V2O5 pores mainly occupied the mesopores and macropores, which was further confirmed by a typical cross-sectional PN-V2O5 with Auger analysis. The S/C/PN-V2O5 composite cathode exhibited a discharge capacity of 632mAhg−1 after 60cycles at the current density of 100mAg−1 and the capacity retention of S/C/PN-V2O5 electrode was 27.3% higher than that of S/C electrode, demonstrating a better cycling performance.
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      PubDate: 2017-03-28T12:00:38Z
      DOI: 10.1016/j.apt.2017.03.013
       
  • Synthesis of hierarchical nanoporous HY zeolites from activated kaolin, a
           central composite design optimization study
    • Authors: Peter Adeniyi Alaba; Yahaya Muhammad Sani; Isah Yakub Mohammed; Yousif Abdalla Abakr; Wan Mohd Ashri Wan Daud
      Abstract: Publication date: Available online 24 March 2017
      Source:Advanced Powder Technology
      Author(s): Peter Adeniyi Alaba, Yahaya Muhammad Sani, Isah Yakub Mohammed, Yousif Abdalla Abakr, Wan Mohd Ashri Wan Daud
      In this article, we investigated the optimum formulation towards synthesis of hierarchical nanoporous HY zeolites from acid activate kaolin. A central composite design (CCD) helped to investigate the influence of aging (X 1), crystallization (X 2) and NaOH solution to kaolin ratio (X 3) on crystallinity (C%), specific surface area (SSA) and hierarchical factor (HF). From the analysis of variance (ANOVA), we deduced that all the process variables show statistical significance towards obtaining high C% and SSA while only X 3 is statistically significant for optimal HF. The effectiveness of models was further evaluated using margin of error and tolerance interval. The Optimum formulation for this hierarchical nanoporous HY zeolite was obtained as 43.60, 64.23 and 6.97 for X 1, X 2, and X 3, respectively. The developed models show that X 3 is the most statistically significant variable because it has the highest coefficient and the lowest p-value in the entire model. These results give instrumental insight into the synthesis of hierarchical nonporous HY zeolite.
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      PubDate: 2017-03-28T12:00:38Z
      DOI: 10.1016/j.apt.2017.03.008
       
  • Parametric investigation of γ-alumina granule preparation via the
           oil-drop route
    • Authors: Mohammad Abdollahi; Hossein Atashi; Farshad Farshchi Tabrizi
      Abstract: Publication date: Available online 23 March 2017
      Source:Advanced Powder Technology
      Author(s): Mohammad Abdollahi, Hossein Atashi, Farshad Farshchi Tabrizi
      Taguchi M32 experimental design was implemented to investigate the effect of operating variables on the structural and textural properties γ-alumina granules produced via the oil-drop route. Aluminum powder and hexamethylenetetramine (HMTA) were used as precursor and gelling agent, respectively. Nitric acid (HNO3) was tested to dissolve aluminum powder as a novel digestive media. Response surface methodology (RSM) was employed to analyze the results of experimental design. The synthesized samples were characterized, by Thermo-gravimetric analysis (TGA/DTA), X-ray diffraction (XRD), nitrogen physisorption, energy dispersive X-ray (EDX), scanning electron microscopy (SEM), and transmitting electron microscopy (TEM). The output of RSM which is a multivariate linear regression model was examined to find out the effect of each factor on the response, namely the total surface area of γ-alumina granules to reach the optimum conditions. The optimized samples possess superior characteristics, e.g. highest surface area, magnificent sphericity, mesoporous structure, monotonous crystalline network, and broad pore size distribution. Based on the results, the surface area of γ-alumina granules relied too much on the temperature of aging solution, aging time and interactions between the factors. The role of heat treatment on the texture properties and morphology evolution of the samples were also precisely discussed.
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      PubDate: 2017-03-28T12:00:38Z
      DOI: 10.1016/j.apt.2017.03.004
       
  • A novel water permeable geopolymer with high strength and high
           permeability coefficient derived from fly ash, slag and metakaolin
    • Authors: Ping Duan; Chunjie Yan; Wei Zhou
      Abstract: Publication date: Available online 23 March 2017
      Source:Advanced Powder Technology
      Author(s): Ping Duan, Chunjie Yan, Wei Zhou
      In this work, a new water permeable geopolymer with high strength and high water permeability coefficient based on fly ash-slag-metakaolin was proposed. The experimental results show that fresh geopolymer composite exhibits dry characteristic and porous structure. The void ratio is 27.6% and the permeability coefficient reaches 1.70cm/s. The compressive strength and flexural strength reach about 30MPa and 6.2MPa, respectively at 1day and reach as high as 49MPa and 11.3MPa at 28days of curing, respectively. After 100 freeze-thaw cycles, the terminal remaining mass is still larger than 80% along with internal damages and deteriorations on geopolymer paste coating. The dense microstructure of geopolymer matrix and interfacial transition zone indicates the high compressive strength, flexural strength and high freeze-thaw resistance of water permeable geopolymer.
      Graphical abstract image

      PubDate: 2017-03-28T12:00:38Z
      DOI: 10.1016/j.apt.2017.03.009
       
  • Influence of Eu substitution for Gd on the structure and photoluminescent
           properties of (Gd1−xEux)2Ti2O7 pyrochlore solid solutions
    • Authors: Garbout
      Abstract: Publication date: Available online 22 March 2017
      Source:Advanced Powder Technology
      Author(s): A. Garbout, M. Férid
      This paper presents a study of the synthesis and structural properties of the pyrochlore-type titanates (Gd1− x Eu x )2Ti2O7. Six compositions with 0≤ x ≤1 were prepared by solid-state reaction with thermal treatments at 1000 and 1200°C under atmospheric pressure conditions. All the products were systematically characterized by X-ray powder diffraction (XRD), Raman spectroscopy, photoluminescence (PL) and photoluminescent excitation spectra (PLE). Structural refinements of X-ray powder diffraction data using Rietveld method show that all compounds of the (Gd1− x Eu x )2Ti2O7 solid solution crystallize in a pyrochlore structure. The lattice parameters increase linearly with increasing Eu content in agreement with Vegard's rule. PL spectra show that the characteristic peaks correspond to the f–f transition 5D0–7F J (J =1, 2, 3 and 4) of Eu3+. The effect of Eu3+ ions concentration on the optical properties, namely, photoluminescence emission, is measured and discussed. The oxides exhibit higher PL intensity with the Eu3+ ion concentration and strong orange emission at 589nm (5D0–7F1) corresponding to the magnetic dipole transition.
      Graphical abstract image

      PubDate: 2017-03-28T12:00:38Z
       
  • Stereological correction method based on sectional texture analysis for
           the liberation distribution of binary particle systems
    • Authors: Takao Ueda; Tatsuya Oki; Shigeki Koyanaka
      Abstract: Publication date: Available online 22 March 2017
      Source:Advanced Powder Technology
      Author(s): Takao Ueda, Tatsuya Oki, Shigeki Koyanaka
      Accurate assessment of liberation state of ore sample is important in mineral processing. In practice, the ore sample is mounted in resin, sectioned, and polished before its liberation state is measured by sectional analysis. This approach typically overestimates the degree of liberation in two-dimensional (2D) measurements. Several models have been proposed to overcome this stereological bias and correct this error in well-examined samples. However, their versatility remains poorly understood. Herein, a stereological correction method was developed for the liberation distribution. First, the complexity of particle sectional texture was assessed using the fractal dimension of the image intensity. Next, the magnitude of stereological bias and 2D measureable parameters such as fractal dimension was correlated by an all-encompassing simulation of various texture types. Finally, stereological correction indices were exclusively estimated from 2D measureable parameters obtained through the correlation. This model exhibited high versatility based on the all-encompassing simulation. The model was validated using nine different irregularly shaped binary particle systems and assessed using areal difference and maximum difference between liberation distribution curves in two and three dimensions. This error indices improved by approximately 80% for the former error index and 90% for the latter index.
      Graphical abstract image

      PubDate: 2017-03-28T12:00:38Z
      DOI: 10.1016/j.apt.2017.03.007
       
  • Preparation and characterization of novel diatomite/ground calcium
           carbonate composite humidity control material
    • Authors: Zhibo Hu; Shuilin Zheng; Mengzi Jia; Xiongbo Dong; Zhiming Sun
      Abstract: Publication date: Available online 21 March 2017
      Source:Advanced Powder Technology
      Author(s): Zhibo Hu, Shuilin Zheng, Mengzi Jia, Xiongbo Dong, Zhiming Sun
      Three kinds of novel diatomite/ground calcium carbonate composite humidity control materials were prepared with different calcination temperatures using diatomite and ground calcium carbonate (GCC) as raw materials. The microstructure and morphology properties of samples were studied by nitrogen gas adsorption, mercury intrusion porosimetry (MIP) and fractal dimensions on the basis of gas adsorption isotherms with FHH methods. Fourier transform infrared spectroscope (FTIR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to characterize the mineral composition and surface properties. Furthermore, X-ray diffraction (XRD), thermo-gravimetry and differential scanning calorimetry (TG-DSC) were used to analyze the formation mechanism of composite material. It was indicated that DG750 shows the better moisture adsorption performance. The 72h moisture adsorbed amount of DG750 reached 11.66%, 8.81% and 8.00% at 98%RH, 85%RH and 75%RH, respectively, which improved about 0.46, 0.54 and 0.53-fold as those of diatomite. The hydrophilic calcium silicate, calcium oxide and calcium hydroxide are formed in the DG750 during the calcinations process. As compared with the raw materials, the content of mesoporous component increases in the DG750, which is in favor of capillary condensation and improving moisture adsorption ability.
      Graphical abstract image

      PubDate: 2017-03-28T12:00:38Z
      DOI: 10.1016/j.apt.2017.03.005
       
  • Inside Front Cover (Aims &amp; Scope, Editors)
    • Abstract: Publication date: April 2017
      Source:Advanced Powder Technology, Volume 28, Issue 4


      PubDate: 2017-03-21T11:31:37Z
       
  • Full title (Editorial Board Members)
    • Abstract: Publication date: April 2017
      Source:Advanced Powder Technology, Volume 28, Issue 4


      PubDate: 2017-03-21T11:31:37Z
       
  • Functional relationships between phytochemicals and drying conditions
           during the processing of blackcurrant pomace into powders
    • Authors: Anna Michalska; Aneta Wojdyło; Grzegorz P. Łysiak; Krzysztof Lech; Adam Figiel
      Abstract: Publication date: Available online 21 March 2017
      Source:Advanced Powder Technology
      Author(s): Anna Michalska, Aneta Wojdyło, Grzegorz P. Łysiak, Krzysztof Lech, Adam Figiel
      The effect of convective drying, microwave-vacuum drying and their combination applied to blackcurrant by-product on the quality being measured in terms of the content of phytochemicals in the powders was examined. Convective drying, along with the increase in the temperature, linearly reduced the content of anthocyanins, flavonols and chlorogenic acids. Microwave vacuum drying significantly shortened the drying time, and resulted in higher retention of bioactive compounds at higher temperatures in comparison to convection. No functional relationship was observed between bioactive compounds and the power of magnetrons thus between the processing temperature and the content of individual groups of polyphenols, apart from delphinidin-3-O-rutinoside and delphinidin-3-O-glucoside. During the dehydration of blackcurrant pomace the exponential formation of hydroxymethylfurfural was noticed. The antioxidant capacity decreased along with the increase in drying temperature and in parallel with the decrease in anthocyanins content, thus suggesting that those polyphenols considerably influence the antioxidant potential of final products.
      Graphical abstract image

      PubDate: 2017-03-21T11:31:37Z
      DOI: 10.1016/j.apt.2017.03.002
       
  • Interphase coordination design in carbamate-siloxane/vaterite composite
           microparticles towards tuning ion-releasing properties
    • Authors: Jin Nakamura; Yoshio Ota; Yoshio Sakka; Toshihiro Kasuga
      Abstract: Publication date: Available online 17 March 2017
      Source:Advanced Powder Technology
      Author(s): Jin Nakamura, Yoshio Ota, Yoshio Sakka, Toshihiro Kasuga
      Siloxane-containing vaterite (SiV) microparticles were prepared with controlling the degree of aminopropyl-functionalization in the siloxane; they are aiming for applications as bone regenerative devices. The aim of this work was to evaluate the structure at siloxane/vaterite interphase and to control the solubility of particles by the structural tuning of siloxane. The particles were spherical with average diameters of 1.1–1.4μm. Differential infrared spectrometry revealed the transformation of aminopropyl terminals in the siloxane into carbamate (NH-COO−) groups. Moreover, the vaterite crystallites in the particles were slightly oriented towards the (001) plane. These results describe the interphase structure, with the carbamate groups coordinating on the Ca2+ ion face in the (001) plane of neighbouring vaterite. Upon soaking in buffer solution, the particles exhibited a rapid initial release of Ca2+ ions within 30min and of soluble silica within 2h. The vaterite in this particle survived for more than 6h. The chemical stability of the siloxane was enhanced by incorporating tetraethoxysilane-derived siloxane with fractions of 24mol% or 50mol%. This enhancement controlled the initial release of not only soluble silica but also Ca2+ ions.
      Graphical abstract image

      PubDate: 2017-03-21T11:31:37Z
      DOI: 10.1016/j.apt.2017.03.003
       
 
 
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