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Publisher: Elsevier   (Total: 3048 journals)

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Showing 1 - 200 of 3048 Journals sorted alphabetically
A Practical Logic of Cognitive Systems     Full-text available via subscription   (Followers: 7)
AASRI Procedia     Open Access   (Followers: 15)
Academic Pediatrics     Hybrid Journal   (Followers: 25, SJR: 1.402, h-index: 51)
Academic Radiology     Hybrid Journal   (Followers: 22, SJR: 1.008, h-index: 75)
Accident Analysis & Prevention     Partially Free   (Followers: 86, SJR: 1.109, h-index: 94)
Accounting Forum     Hybrid Journal   (Followers: 25, SJR: 0.612, h-index: 27)
Accounting, Organizations and Society     Hybrid Journal   (Followers: 30, 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: 362, 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   (Followers: 1)
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: 227, 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: 10, 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: 1)
Acta Poética     Open Access   (Followers: 4)
Acta Psychologica     Hybrid Journal   (Followers: 24, SJR: 1.365, h-index: 73)
Acta Sociológica     Open Access  
Acta Tropica     Hybrid Journal   (Followers: 6, 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: 4, 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)
Acute Pain     Full-text available via subscription   (Followers: 13)
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: 6)
Additive Manufacturing     Hybrid Journal   (Followers: 7, SJR: 1.039, h-index: 5)
Additives for Polymers     Full-text available via subscription   (Followers: 21)
Advanced Drug Delivery Reviews     Hybrid Journal   (Followers: 134, 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: 17, SJR: 0.739, h-index: 33)
Advances in Accounting     Hybrid Journal   (Followers: 9, 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: 26, 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: 11, SJR: 0.801, h-index: 26)
Advances in Applied Microbiology     Full-text available via subscription   (Followers: 22, 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: 25, 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 Cell Aging and Gerontology     Full-text available via subscription   (Followers: 4)
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: 27, 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: 9, SJR: 1.268, h-index: 45)
Advances in Clinical Chemistry     Full-text available via subscription   (Followers: 29, 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 Dermatology     Full-text available via subscription   (Followers: 12)
Advances in Developmental Biology     Full-text available via subscription   (Followers: 11)
Advances in Digestive Medicine     Open Access   (Followers: 6)
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: 44, SJR: 3.25, h-index: 43)
Advances in Engineering Software     Hybrid Journal   (Followers: 26, 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: 42, 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: 50, SJR: 0.674, h-index: 38)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 16)
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: 12)
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: 22, SJR: 0.906, h-index: 24)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 9, SJR: 0.497, h-index: 31)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 26)
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: 36, 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: 6)
Advances in Intl. Accounting     Full-text available via subscription   (Followers: 4)
Advances in Life Course Research     Hybrid Journal   (Followers: 8, SJR: 0.764, h-index: 15)
Advances in Lipobiology     Full-text available via subscription   (Followers: 2)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 9)
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: 6, 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: 22)
Advances in Molecular and Cellular Endocrinology     Full-text available via subscription   (Followers: 10)
Advances in Molecular Toxicology     Full-text available via subscription   (Followers: 8, SJR: 0.324, h-index: 8)
Advances in Nanoporous Materials     Full-text available via subscription   (Followers: 4)
Advances in Oncobiology     Full-text available via subscription   (Followers: 3)
Advances in Organ Biology     Full-text available via subscription   (Followers: 2)
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: 24, SJR: 0.4, h-index: 28)
Advances in Pharmaceutical Sciences     Full-text available via subscription   (Followers: 13)
Advances in Pharmacology     Full-text available via subscription   (Followers: 15, SJR: 1.718, h-index: 58)
Advances in Physical Organic Chemistry     Full-text available via subscription   (Followers: 8, 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: 17)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 20, SJR: 1.5, h-index: 62)
Advances in Psychology     Full-text available via subscription   (Followers: 62)
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: 2, SJR: 0.1, h-index: 2)
Advances in Space Biology and Medicine     Full-text available via subscription   (Followers: 5)
Advances in Space Research     Full-text available via subscription   (Followers: 361, SJR: 0.606, h-index: 65)
Advances in Structural Biology     Full-text available via subscription   (Followers: 8)
Advances in Surgery     Full-text available via subscription   (Followers: 7, SJR: 0.823, h-index: 27)
Advances in the Study of Behavior     Full-text available via subscription   (Followers: 30, SJR: 1.321, h-index: 56)
Advances in Veterinary Medicine     Full-text available via subscription   (Followers: 16)
Advances in Veterinary Science and Comparative Medicine     Full-text available via subscription   (Followers: 13)
Advances in Virus Research     Full-text available via subscription   (Followers: 5, SJR: 1.878, h-index: 68)
Advances in Water Resources     Hybrid Journal   (Followers: 44, 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: 329, 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: 5, SJR: 0.344, h-index: 6)
Ageing Research Reviews     Hybrid Journal   (Followers: 8, SJR: 3.289, h-index: 78)
Aggression and Violent Behavior     Hybrid Journal   (Followers: 413, SJR: 1.385, h-index: 72)
Agri Gene     Hybrid Journal  
Agricultural and Forest Meteorology     Hybrid Journal   (Followers: 16, SJR: 2.18, h-index: 116)
Agricultural Systems     Hybrid Journal   (Followers: 30, SJR: 1.275, h-index: 74)
Agricultural Water Management     Hybrid Journal   (Followers: 40, 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: 55, 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: 5, 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: 11, SJR: 0.922, h-index: 66)
Alcoholism and Drug Addiction     Open Access   (Followers: 8)
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   (Followers: 1)
Algal Research     Partially Free   (Followers: 8, 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: 4, SJR: 0.776, h-index: 35)
Alpha Omegan     Full-text available via subscription   (SJR: 0.121, h-index: 9)
ALTER - European J. of Disability Research / Revue Européenne de Recherche sur le Handicap     Full-text available via subscription   (Followers: 9, SJR: 0.158, h-index: 9)
Alzheimer's & Dementia     Hybrid Journal   (Followers: 46, SJR: 4.289, h-index: 64)
Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring     Open Access   (Followers: 4)
Alzheimer's & Dementia: Translational Research & Clinical Interventions     Open Access   (Followers: 4)
Ambulatory Pediatrics     Hybrid Journal   (Followers: 5)
American Heart J.     Hybrid Journal   (Followers: 48, 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: 40, SJR: 0.574, h-index: 65)
American J. of Geriatric Pharmacotherapy     Full-text available via subscription   (Followers: 9, 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: 26, SJR: 1.259, h-index: 81)
American J. of Kidney Diseases     Hybrid Journal   (Followers: 32, SJR: 2.313, h-index: 172)
American J. of Medicine     Hybrid Journal   (Followers: 46, 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: 200, SJR: 2.255, h-index: 171)
American J. of Ophthalmology     Hybrid Journal   (Followers: 59, SJR: 2.803, h-index: 148)
American J. of Ophthalmology Case Reports     Open Access   (Followers: 6)
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: 25, SJR: 0.59, h-index: 45)
American J. of Pathology     Hybrid Journal   (Followers: 26, SJR: 2.653, h-index: 228)
American J. of Preventive Medicine     Hybrid Journal   (Followers: 24, SJR: 2.764, h-index: 154)
American J. of Surgery     Hybrid Journal   (Followers: 35, SJR: 1.286, h-index: 125)
American J. of the Medical Sciences     Hybrid Journal   (Followers: 12, 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: 58, SJR: 0.124, h-index: 9)
Anaesthesia Critical Care & Pain Medicine     Full-text available via subscription   (Followers: 12)
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: 4, SJR: 2.577, h-index: 7)
Analytica Chimica Acta     Hybrid Journal   (Followers: 37, SJR: 1.548, h-index: 152)
Analytical Biochemistry     Hybrid Journal   (Followers: 166, SJR: 0.725, h-index: 154)
Analytical Chemistry Research     Open Access   (Followers: 8, SJR: 0.18, h-index: 2)
Analytical Spectroscopy Library     Full-text available via subscription   (Followers: 12)
Anesthésie & Réanimation     Full-text available via subscription   (Followers: 1)
Anesthesiology Clinics     Full-text available via subscription   (Followers: 23, 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: 171, SJR: 1.907, h-index: 126)

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Journal Cover Advanced Powder Technology
  [SJR: 0.739]   [H-I: 33]   [17 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 0921-8831 - ISSN (Online) 1568-5527
   Published by Elsevier Homepage  [3048 journals]
  • Ag3PO4/CuO composites utilizing the synergistic effect of photocatalysis
           and Fenton-like catalysis to dispose organic pollutants
    • Authors: Peiyan Ma; Yong Yu; Jingjing Xie; Zhengyi Fu
      Pages: 2797 - 2804
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Peiyan Ma, Yong Yu, Jingjing Xie, Zhengyi Fu
      Both photocatalysis and Fenton-like catalysis present promising and potential technologies for water purification. However, single photocatalysis or Fenton-like catalysis cannot meet the practical demand for complicated pollutes treatment in water. Herein, we report an environmentally benign Ag3PO4/CuO catalysts that combine the two catalysis. The synthesized Ag3PO4 acts asan efficient photocatalyst, and Fenton-like CuO catalysis decomposes organic pollutes in the presence of H2O2. A series of Ag3PO4/CuO composites were obtained by regulating the molar ratio of Ag3PO4 to CuO via hydrothermal and ion exchange reactions. The optimized composite shows a significant improvement in catalytic activity over pure Ag3PO4 under visible light or CuO with H2O2, owing to the synergistic effect of photocatalysis and Fenton-like catalysis. It is noticeable that the Ag3PO4/CuO composites retain efficient performance even after five cycling runs. The catalytic mechanism involves matched band structures, Z-scheme photocatalytic mechanism, and the generation of a large amount of hydroxyl radicals.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.08.004
       
  • Characteristics and release property of polylactic acid/sodium
           monofluorophosphate microcapsules prepared by spray drying
    • Authors: Jiandong Zuo; Jia Zhan; Chaoyun Luo; Biqin Dong; Feng Xing; Dazhu Chen
      Pages: 2805 - 2811
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Jiandong Zuo, Jia Zhan, Chaoyun Luo, Biqin Dong, Feng Xing, Dazhu Chen
      Microcapsules composed of polylactic acid (PLA)/corrosion inhibitor sodium monofluorophosphate (MFP) were prepared by spray drying, and the effects of processing parameters on the morphology and encapsulation efficiency of the microcapsules were investigated. The results showed that low viscous PLA solution only resulted in porous microcapsules with low encapsulation efficiency, whereas filamentous substances were produced instead of microcapsules once PLA solution content exceeded 5%. When spray pressure exceeded 0.4MPa, the microcapsule surface was wrinkled due to high evaporation rate of the atomized droplets. The spray pressure less than 0.3MPa created larger atomized droplets and yielded the adhesive microcapsules with lower encapsulation efficiency. The optimal emulsion parameters were as follows: PLA concentration, 5%; water-oil ratio, 1:9; inlet air temperature, 50°C; and spray pressure, 0.4MPa. The resulting microcapsules exhibited a good sustained-release behavior in a simulated concrete pore solution.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.08.006
       
  • Effect of reduced graphene oxide (rGO) on structural, optical, and
           dielectric properties of Mg(OH)2/rGO nanocomposites
    • Authors: Richa Bhargava; Shakeel Khan
      Pages: 2812 - 2819
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Richa Bhargava, Shakeel Khan
      In this paper, we report the synthesis of Mg(OH)2 NPs and Mg(OH)2–rGO nanocomposites (NCs) by microwave assisted co-precipitation method. The crystal phase, structural morphology and functional groups of the as-synthesized samples were analyzed by X-ray diffraction (XRD), Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR). Raman spectroscopy was used to study the defects in the samples. Raman spectroscopy and the SEM results validate the growth of Mg(OH)2 NPs on the rGO nanosheets. The chemical composition of the prepared samples was analyzed by EDAX. Optical properties of the as-synthesized samples were studied by UV–visible spectroscopy and the energy band gap was calculated by Tauc relation which shows a decrease in band gap with an increase in the amount of Graphene Oxide (GO) in the NCs. The dielectric properties were studied asa function of frequency over a range of 50Hz to 5MHz at room temperature. The value of dielectric constant decreases with an increase in frequency, this could be due to the existence of a polarization process at the border of the rGO sheets and Mg(OH)2 NPs. The value of dielectric loss shows a decreasing trend with an increase in frequency whereas the larger value of AC conductivity in Mg(OH)2–rGO NCs as compared to Mg(OH)2 NPs approves the restoration of sp2 network in the graphene sheets.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.08.008
       
  • Inline method of droplet and particle size distribution analysis in dilute
           disperse systems
    • Authors: Christian Fischer; Maciej Jaskulski; Evangelos Tsotsas
      Pages: 2820 - 2829
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Christian Fischer, Maciej Jaskulski, Evangelos Tsotsas
      In the present article a measurement method of particle size distributions (PSD) in industrial installations which use a dispersed phase of low concentration (like spray dryers or spray scrubbers) is introduced. A new type of inline-measurement system has been developed and designed to work in spray drying conditions. A standard digital camera is used to record shadows of flowing particles inside the spray drying chamber. Collected images were analyzed by a newly developed software which recognizes particles only in the focus area and eliminates several types of artifacts. The constructed prototype of the PSD inline-analyzer was installed and used to monitor large laboratory scale spray dryer. All data collected by the designed system during the spray drying experiments were compared with data measured with an offline reference system to show accuracy of the new measurement technique.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.08.009
       
  • Formation mechanisms of a dust-removal air curtain in a fully-mechanized
           excavation face and an analysis of its dust-removal performances based on
           CFD and DEM
    • Authors: Haiming Yu; Weimin Cheng; Hao Wang; Huitian Peng; Yao Xie
      Pages: 2830 - 2847
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Haiming Yu, Weimin Cheng, Hao Wang, Huitian Peng, Yao Xie
      A high concentration of dust in a fully-mechanized excavation face is a serious threat to the safety of production underground and miners’ health. This paper discusses the use of a novel air curtain generator and proposes a novel dust control and prevention technique. Based on the k-ε two-equation turbulence model, Hertz-Mindlin model and the CFD-DEM coupled interface compiled with C++ language, this paper firstly constructs a simulation model of the coupling between airflows and dust in a fully-mechanized excavation face, and then simulates the airflow fields and dust fields under forced/exhaust ventilation conditions with and without a novel air curtain generator being utilized. The results show that when only the forced/exhaust ventilation was used, a high concentration of dust spread throughout the entire tunnel space and no effective air curtain was formed. Furthermore, after the air curtain generator was turned on, as the radial-to-axial forced air ratio (PFQ ) increased, the horizontal vortex in the front of the head-on section weakened gradually, and the originally disordered airflows behind the heading machine moved uniformly towards the head-on section. As the PFQ further increased, the distance (d) between the formed air curtain and head-on section decreased overall; through a curve fitting, this relationship can be written as: d =−5.247ln(PFQ )+13.569. When the PFQ >5:5, the average negative-pressure-induced dust-exhaust capacity increased, the distance between the formed air curtain and the head-on section decreased, and the re-entrainment of dust did not take place in a straightforward manner. Finally, some field measurements were carried out in order to validate the simulated results, with the subsequent comparison showing that the numerical simulated results were basically accurate.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.08.010
       
  • Powder disperser for the continuous aerosolizing of dry powdered
           nanoparticles
    • Authors: Chengxu Tu; Jianzhong Lin; Zhaoqin Yin; Fubing Bao; Pengfei Du
      Pages: 2848 - 2858
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Chengxu Tu, Jianzhong Lin, Zhaoqin Yin, Fubing Bao, Pengfei Du
      A new method has been developed for the continuous aerosolization of dry powdered nanoparticles using a commercially available and cost-effective vacuum generator. A commercial doser was used to supply nanoparticles continuously and precisely. A novel device (called a pressure equilibrium unit) was designed to connect the doser and the vacuum generator to make sure both parts avoid suffering from pressure shock. This system is denoted asa continuous vacuum generator disperser (CVGD). The dosing rate of the CVGD for different particle materials tends to a constant value. All the aerosolized engineered nanoparticles (ENPs) of varying materials and primary diameter obtained through the CVGD distribute identically log-normally asa whole. It is more difficult to separate the nanoparticles of smaller primary diameter using the CVGD, due to the stronger van der Waals attractive force between them. The total particle concentration can be adjusted easily by changing the motor speed of the doser (Dr), which was directly proportional to the dosing rate. As Dr increased, the PSDs shifted to a larger diameter to some extent. For sufficient large dosing rates, the CVGD performance could be improved significantly by increasing the inlet pressure of the vacuum generator (P j).
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      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.08.011
       
  • Fabrication, characterization and comparison of DSSC using anatase TiO2
           synthesized by various methods
    • Authors: Sanjivani V. Umale; Sneha N. Tambat; Vediappan Sudhakar; Sharad M. Sontakke; Kothandam Krishnamoorthy
      Pages: 2859 - 2864
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Sanjivani V. Umale, Sneha N. Tambat, Vediappan Sudhakar, Sharad M. Sontakke, Kothandam Krishnamoorthy
      In this study, anatase TiO2 nanoparticles were synthesized by three techniques, namely, sol–gel, acid-base co-catalyst and room temperature colloidal methods. The synthesized materials were characterized by X-ray diffraction, scanning electron microscopy, pore diameter, pore volume and surface area. The dye-sensitized solar cells were fabricated using the synthesized materials and characterized for incident photon to current conversion efficiency, photocurrent density to photo voltage measurement and electrochemical impedance analysis. Among the studied materials, TiO2 synthesized by sol–gel method displayed highest photon to current conversion of 76.8% and a maximum solar cell efficiency of 7.85% with Jsc of 14.75mA/cm2, Voc of 0.76V and FF of 0.7. This is the first study to report a high power conversion efficiency of DSSC using a sol–gel synthesized titania and its comparison with other two synthesized materials. The high power conversion efficiency of the solar cell using TiO2 synthesized by sol–gel method is attributed to its characteristic properties such high surface area, larger pore diameter and larger pore volume and highest dye loading capacity.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.08.012
       
  • Effect of microwave irradiation on crystal growth of zeolitized coal fly
           ash with different solid/liquid ratios
    • Authors: Tahani Aldahri; Jamshid Behin; Hossein Kazemian; Sohrab Rohani
      Pages: 2865 - 2874
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Tahani Aldahri, Jamshid Behin, Hossein Kazemian, Sohrab Rohani
      In the present work, coal fly ash (CFA) was converted to zeolite (CFAZP) experimentally at atmospheric pressure via a conventional hydrothermal heating for 6h at low temperature (90±3°C) followed by microwave irradiation for 30min. The synthesized products were characterized using XRD, TGA/DTA, SEM, PSD, BET, and cation-exchange capacity (CEC) techniques. The effect of microwave on the crystal growth of nucleated CFAZP at different solid/liquid ratios (suspended CFA mass to NaOH solution volume, g/mL) was studied. A three-variable, three level central composite statistical experimental design was applied to investigate the effect of the independent variables on the response function defined as the ratio of the characteristic peak intensity at 2θ: 28° of a sample to that of the same peak of a sample run for 24h with conventional heating. The relative peak intensity of CFAZP as high as 97% was achieved under optimum experimental conditions with 1M of NaOH concentration, 6h of conventional heating followed by 30min microwave irradiation with a solid/liquid ratio of 0.40g/mL. Under constant microwave energy, higher solid/liquid ratios led to higher relative peak intensity of the product.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.08.013
       
  • Production of composite particles using an innovative continuous dry
           coating process derived from extrusion
    • Authors: Fanny Cavaillès; Romain Sescousse; Alain Chamayou; Laurence Galet
      Pages: 2875 - 2885
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Fanny Cavaillès, Romain Sescousse, Alain Chamayou, Laurence Galet
      Dry particle coating is used to modify surface properties and monitor the end use properties of powders. These processes are mainly running in batch mode. In certain cases, continuous processes may present interest for specific applications (limitation of investments, stability, versatility…). In this study, the feasibility of dry coating particles by an innovative way derived from the well-known extrusion process was investigated. Adhesion between host and guest particles is induced by mechanical shear stress during processing. A preliminary parametric study on microcrystalline cellulose particles as host particles was carried out in order to determine the operating condition range. Then, coating was successfully performed using talc and a microcrystalline cellulose system, which demonstrates the feasibility of this novel process and led to different morphologies according to the operating conditions.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.08.014
       
  • Co-flowing of partially miscible liquids for the generation of
           monodisperse microparticles
    • Authors: Lipeng Zhang; Andrew Parison; Yinghe He
      Pages: 2886 - 2892
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Lipeng Zhang, Andrew Parison, Yinghe He
      Liquid templating is a well-established method for the fabrication of monodisperse microparticles. Nearly all liquid templating methods use totally immiscible liquids for the generation of monodisperse liquid droplets. With this approach, it is difficult to mass produce monodisperse droplets in the submicron range. The approach also suffers from some common difficulties associated with the use of small openings or channels required for the generation of small sized droplets including high back pressures and frequent blockage of the flow channels. Aimed at overcoming these difficulties, this paper presents a new co-flowing method that uses partially miscible liquids for the generation of a monodisperse liquid template. The results show that addition of a co-solvent in the inner phase that makes the liquid systems partially miscible changes the bulk and interfacial properties of the liquids that facilitate the generation of smaller droplets. They also confirm that the co-solvent concentration in the inner phase can be used asan additional tool to manipulate the mean size of the resultant droplets and solid particles.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.08.015
       
  • Enhanced visible light photocatalytic activity of CeO2/alumina
           nanocomposite: Synthesized via facile mixing-calcination method for dye
           degradation
    • Authors: P. Latha; K. Prakash; S. Karuthapandian
      Pages: 2903 - 2913
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): P. Latha, K. Prakash, S. Karuthapandian
      In this present study, an effort has been made to novel CeO2/alumina nanocomposite photocatalyst was fabricated through mixing-calcination method. The XRD, IR, SEM, TEM, EDX and XPS results designated that these synthesized materials are formed effectively. The photocatalytic results for the degradation of dye solution indicate that the most dynamic ratio is CeO2:Al2O3 (2.5:1) under visible light irradiation. The photocatalytic degradation was made under dark and in the presence of light to establish the photocatalytic efficiency of the synthesized photocatalyst. The improved performance of CeO2/alumina nanocomposite is attributed to the separation efficiency of photo-induced charge carriers and it inhibit charge recombination. The major active species are determined by radical scavengers trapping experiments were revealed that superoxide radical ( O2 −) and hydroxyl radical ( OH) are playing a vital role in the degradation of dye solution. The stability of catalyst was confirmed by consecutive runs of CeO2/alumina nanocomposite.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.08.017
       
  • Simultaneous control of size and surface functionality of silica particle
           via growing method
    • Authors: Seongjun Moon; Kyung Jin Lee
      Pages: 2914 - 2920
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Seongjun Moon, Kyung Jin Lee
      Although silane treatment has been studied asa simple and powerful tool to modify the surface of silica particle, there are still several difficulties in terms of controlling surface functionality and size of nanoparticles. Here we develop a growing method to overcome above drawback. The method was processed by continuously injecting precursor using syringe pump. According to the continuous injection, the concentration of precursors in media are properly controlled, and then the continuous injection of precursor promotes the growth of silica particles. When the functional silanes (silane coupling agents) are used, the method can control the amount of surficial functional groups on the silica particle, and can adjust diameter of the particle simultaneously. Furthermore, well-controlled functional silica particles made by growing method are used for catalytic reaction, Knoevenagel reaction, asa solid state catalyst.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.08.019
       
  • Shell porosity in spray fluidized bed coating with suspensions
    • Authors: M. Schmidt; A. Bück; E. Tsotsas
      Pages: 2921 - 2928
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): M. Schmidt, A. Bück, E. Tsotsas
      An experimental study regarding spray fluidized bed coating with aqueous suspensions is presented. The dependency of coating shell morphology on drying parameters, atomization pressure and composition of suspension is investigated. The results are compared to existing work regarding spray fluidized bed coating with aqueous solutions of crystalline material. Contrary to coating with solutions, coating shell smoothness and porosity does not depend on drying conditions. Nevertheless, atomizing pressure and mass fraction of solids in suspension have large influence on coating shell morphology. High atomization pressures, leading to small droplets, result in smooth coating surfaces and low shell porosities. A similar trend is observed for a low mass fraction of solids in the suspension.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.08.020
       
  • Dynamic fracture behavior of single and contacting Poly(methyl
           methacrylate) particles
    • Authors: Niranjan D. Parab; Zherui Guo; Matthew C. Hudspeth; Benjamin J. Claus; Kamel Fezzaa; Tao Sun; Weinong W. Chen
      Pages: 2929 - 2939
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Niranjan D. Parab, Zherui Guo, Matthew C. Hudspeth, Benjamin J. Claus, Kamel Fezzaa, Tao Sun, Weinong W. Chen
      Fracture behaviors of single, two, and multiple contacting spherical Poly(methyl methacrylate) (PMMA) particles were recorded using high speed synchrotron X-ray phase contrast imaging. A miniaturized Kolsky bar setup was used to apply dynamic compressive loading on the PMMA particles. In both single and two particle experiments, cracking initiated near the center of the particles and propagated towards the contacts. The crack bifurcated near the contact points for single particle experiments, thus forming conical fragments. The crack bifurcation and subsequent conical fragment formation was observed only at the particle-particle contact for two particle experiments. The particles were observed to fracture in hemispherical fragments normal to the contact plane in the multi-particle experiments. The observed failure mechanisms strongly suggest that the maximum tensile stress near the center of the particle is the critical parameter governing fracture of the particles. Furthermore, the compressive stress under the contact areas led to the bifurcation and subsequent conical fragment formation.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.08.021
       
  • Drying oil-in-water Pickering emulsions to make redispersible powders
    • Authors: Catherine P. Whitby; Haley Scarborough; Yung Ngothai
      Pages: 2940 - 2946
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Catherine P. Whitby, Haley Scarborough, Yung Ngothai
      We report on the formation of powder by drying oil-in-water emulsions stabilized by silanised silica nanoparticles. Drying was achieved by spraying fine droplets (up to a hundred micrometres in diameter) of the emulsions into a chamber of hot, flowing air. We show that the surfaces of droplets of the emulsions become enriched with nanoparticles as the water evaporates in the drying chamber. Controlling the relative amounts of oil and particles in the droplets being dried is the key to encapsulating the oil drops within the powder. Dried Pickering emulsions containing up to 40wt% encapsulated oil that could be dispersed in water as drops of the same size as in the original emulsion were produced.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.09.001
       
  • Numerical simulation of a commercial FCC regenerator using Multiphase
           Particle-in-Cell methodology (MP-PIC)
    • Authors: Abdallah S. Berrouk; Allen Huang; Shivkumar Bale; Priyanka Thampi; Krishnaswamy Nandakumar
      Pages: 2947 - 2960
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Abdallah S. Berrouk, Allen Huang, Shivkumar Bale, Priyanka Thampi, Krishnaswamy Nandakumar
      Catalyst regeneration process has recently been the subject of comprehensive research investigations focusing mainly on the chemistry of the regeneration while overlooking the bed hydrodynamics and its effects on the regeneration performance. For this purpose, an industrial Fluid Catalytic Cracking (FCC) regenerator is simulated using a Multi-Phase Particle-In-Cell (MP-PIC) approach. The simulation is performed using a three-dimensional regenerator design with complex internals in order to study bed hydrodynamics, thermal effects, and chemical kinetics. The numerical model is then used to study typical industrial issues linked to the operation of industrial regenerators such as erosion areas, standpipe drainage, and CO emission levels. It is noticed that total outlet gas flow exceeds total inlet flow due to the formation of coke combustion products, an undersized standpipe, and inefficient placement of the air distributor rings. Highest erosion occurs in the feed line and plate. A low-temperature column exists in the center of the unit, and the highest temperatures are outside of the diplegs in the periphery of the freeboard. Elevated CO levels are present in the outlet gas because of poorly designed air distributor rings and lower than optimal temperatures in the unit. These simulation results show the numerous modeling capabilities of the MP-PIC approach to identify possible performance and reliability issues of an industrial process. Some redesign proposals have been made to enhance the FCC regenerator operations.
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      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.09.002
       
  • Experimental study and discrete element method simulation of Geldart Group
           A particles in a small-scale fluidized bed
    • Authors: Tingwen Li; Swapna Rabha; Vikrant Verma; Jean-François Dietiker; Yupeng Xu; Liqiang Lu; William Rogers; Balaji Gopalan; Greggory Breault; Jonathan Tucker; Rupen Panday
      Pages: 2961 - 2973
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Tingwen Li, Swapna Rabha, Vikrant Verma, Jean-François Dietiker, Yupeng Xu, Liqiang Lu, William Rogers, Balaji Gopalan, Greggory Breault, Jonathan Tucker, Rupen Panday
      Geldart Group A particles are of great importance in various chemical processes because of advantages such as ease of fluidization, large surface area, and many other unique properties. It is very challenging to model the fluidization behavior of such particles as widely reported in the literature. In this study, a pseudo-2D experimental column with a width of 5cm, a height of 45cm, and a depth of 0.32cm was developed for detailed measurements of fluidized bed hydrodynamics of fine particles to facilitate the validation of computational fluid dynamic (CFD) modeling. The hydrodynamics of sieved FCC particles (Sauter mean diameter of 148µm and density of 1300kg/m3) and NETL-32D sorbents (Sauter mean diameter of 100µm and density of 480kg/m3) were investigated mainly through the visualization by a high-speed camera. Numerical simulations were then conducted by using NETL’s open source code MFIX-DEM. Both qualitative and quantitative information including bed expansion, bubble characteristics, and solid movement were compared between the numerical simulations and the experimental measurement. The cohesive van der Waals force was incorporated in the MFIX-DEM simulations and its influences on the flow hydrodynamics were studied.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.09.003
       
  • Induction-activated self-propagating, high-temperature synthesis of nickel
           aluminide
    • Authors: M. Shekari; M. Adeli; A. Khobzi; M. Kobashi; N. Kanetake
      Pages: 2974 - 2979
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): M. Shekari, M. Adeli, A. Khobzi, M. Kobashi, N. Kanetake
      The self-propagating high-temperature synthesis (SHS) of nickel aluminide from elemental powders using an induction-activated method was investigated. The method could provide the high heating rates required for the surface layers of a compressed specimen to reach the ignition point, and develop a stable, exothermic reaction front traveling throughout the sample. The temperature history of the samples was recorded during the process to evaluate the combustion temperature; first light criterion was used to estimate the time-to-ignition. Temperatures higher than 2000K were reached during the process, which shows that the released heat is sufficient for melting the NiAl product (Tm =1911K). Asa result, high-density NiAl products were obtained. The effect of such parameters as sample green density, nickel particle size, and sample aspect ratio on the combustion temperature and ignition time was studied. XRD as well as SEM analyses showed that regardless of samples’ initial conditions, the main phase detected in the products was NiAl.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.09.004
       
  • The effect of molybdenum on optical properties of ZnO nanoparticles in
           Ultraviolet–Visible region
    • Authors: A. Khorsand Zak; A. Ghanbari; T. ShekoftehNarm
      Pages: 2980 - 2986
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): A. Khorsand Zak, A. Ghanbari, T. ShekoftehNarm
      Zn1−xMoxO (x=0.0, 0.01, 0.03, and 0.05) nanoparticles (NPs) are synthesized by using gelatin, via the sol-gel method. A calcination temperature of 600°C is maintained for 2h. The influence of molybdenum concentration on the structural and optical properties of these NPs is demonstrated. Synthesized NPs are characterized using X-ray diffraction (XRD), UV–vis spectroscopy, and transmission electron microscopy (TEM). XRD patterns reveal the crystallite nature of samples that exist in the hexagonal wurtzite phase. TEM images manifest the existence of nearly spherically-shaped NPs. The UV–vis spectroscopy results showed that the absorption edge of ZnO nanoparticles is red-shifted by adding molybdenum. Finally, the optical parameters of the refractive index and permittivity of the synthesized samples were calculated using Kramers-Kronig relations using the UV–vis spectra.
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      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.09.006
       
  • Strong metal-support interactions (SMSIs) between Pt and Ti3+ on Pt/TiOx
           nanoparticles for enhanced degradation of organic pollutant
    • Authors: Febrigia Ghana Rinaldi; Aditya Farhan Arif; Takashi Ogi; Kikuo Okuyama; Eishi Tanabe
      Pages: 2987 - 2995
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Febrigia Ghana Rinaldi, Aditya Farhan Arif, Takashi Ogi, Kikuo Okuyama, Eishi Tanabe
      In this work, Pt nanoparticles were deposited onto the surface of Magnéli phase titanium suboxide (TiOx) nanoparticles using a microwave-assisted deposition method. The effect of different concentrations of Pt nanoparticles was investigated to evaluate the strong metal-support interactions (SMSIs) between Pt and TiOx based on their performance for the degradation of organic pollutant molecules. The adsorption and catalytic performance of the as-synthesized Pt/TiOx nanoparticles were evaluated with respect to the degradation of rhodamine B (RhB) molecules without any external energy source. The Pt/TiOx nanoparticles with Pt loading at 10wt% (10%Pt/TiOx) exhibited a remarkable performance. The XPS, CV, and FTIR analyses confirmed the presence of RhB degradation reactions under dark condition. This remarkable performance of the Pt/TiOx nanoparticles was attributed to the SMSIs between Pt and Ti3+ atoms, which improves their performance compared with Pt/TiO2 nanoparticles, and high density of active sites due to their nanometer size, which results in better performance compared with that of Pt/TiOx submicron particles.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.09.007
       
  • Cost-effective liquid-phase exfoliation of molybdenum disulfide by
           prefreezing and thermal-shock
    • Authors: Leila Taran; Reza Rasuli
      Pages: 2996 - 3003
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Leila Taran, Reza Rasuli
      In this work, we present a facile method without hazardous material for improving the liquid-phase exfoliation of MoS2 nanosheets by use of pre-freezing and thermal shock. The MoS2 bulk is easily exfoliated and functionalized by prefreezing and thermal shock of MoS2 powder in the ethanol solvent. Atomic force microscopy confirms that the approach can exfoliate MoS2 powder to nanosheets. UV–visible spectroscopy of the prepared samples shows that fingerprint excitonic peaks appear in the spectrums and they become sharper by repeating the process. Optical band gap from Tauc plot of UV–visible spectrum shows an increase in the band gap of exfoliated MoS2 up to 1.85eV and the surface energy of the exfoliated MoS2 is measured as 29.8mJ/m2. Annealing the prepared samples at temperatures up to 400°C decreases the contact angle of water droplet from 130° down to 2°. X-ray diffraction patterns and Fourier transform infrared spectroscopy confirm that exfoliated MoS2 is functionalized during the exfoliation process and molybdite is formed on the surface by crumpling and agglomerating nanosheets due to heating, which is mainly responsible for increasing the surface energy as well as superhydrophilicity of the samples at 400°C.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.09.010
       
  • Investigation into the ship motion induced moisture migration during
           seaborne coal transport
    • Authors: Wei Chen; Jian Chen; Kenneth Williams; Craig Wheeler
      Pages: 3004 - 3013
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Wei Chen, Jian Chen, Kenneth Williams, Craig Wheeler
      The inherent moisture in a coal cargo constantly migrates under the dynamic ship motion during maritime transport. The moisture often builds up at the bottom of the cargo. The accumulated water, if not removed sufficiently by the bilge well, can cause safety concerns during a voyage and difficulties during cargo unloading. The study presented in this paper aims to develop a program to investigate the moisture migration within coal cargoes in order to assess and eliminate shipping risks. The moisture migration phenomenon is initially modelled by adopting the classic infiltration theory, and considering the ship motions experienced by bulk carriers. An experimental method is developed to empirically characterise the moisture migration of a coal sample under simulated shipping dynamics. A predictive model is also developed to estimate the total moisture migration in a full size cargo by properly scaling up the experimental results. The model was validated by bilge well log collected from actual coal shipping voyages from Australia to international destinations.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.09.011
       
  • Silo quaking of iron ore train load out bin – A time-varying mass
           structural dynamic problem
    • Authors: Phung Tu; Vanissorn Vimonsatit
      Pages: 3014 - 3025
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Phung Tu, Vanissorn Vimonsatit
      Expanded flow bins are commonly used in the material handling industry to store and load train wagons. These bins are known in the industry as Train Load Out (TLO) bins. Several iron ore TLO bins have been designed and constructed to accommodate this demand. It has been reported that some iron ore TLO bins suffer a dynamic condition during discharge known as silo quaking. The quake causes several problems, which could lead to structural connections failure, reduced fatigue life of structural connections, computer data corruption, on-site personnel discomfort, loss of production, and increase in maintenance costs. However, the author had structurally designed a 2500 tonne iron ore TLO and prevented silo quaking by providing sufficient stiffness, damping and mass to counterbalance the pulsating loads and mass losses produced by the flowing iron ore. In this paper, a numerical model incorporating time-varying mass will be presented to explain the dynamics of Iron Ore TLO Bin. The model is validated by experimental results obtained from a 1 in 10 scaled model. The proposed numerical model supports the theory that pulsation loads occur in almost all bins and whether the induced dynamic loads cause any quaking problems are dependent on the severity of the loads, natural frequencies of the bin and its supporting structure.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.09.012
       
  • Synthesis, defect characterization and photocatalytic degradation
           efficiency of Tb doped CuO nanoparticles
    • Authors: L. Vimala Devi; S. Sellaiyan; T. Selvalakshmi; H.J. Zhang; A. Uedono; K. Sivaji; S. Sankar
      Pages: 3026 - 3038
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): L. Vimala Devi, S. Sellaiyan, T. Selvalakshmi, H.J. Zhang, A. Uedono, K. Sivaji, S. Sankar
      Monoclinic undoped and Tb doped CuO are prepared by solution combustion method and annealed at different temperatures. The effect of annealing and doping on their structural and optical properties of CuO are examined using XRD, FTIR and DRS. The surface and lattice defects in CuO and Tb doped CuO is analyzed qualitatively and quantitatively using positron lifetime and Doppler broadening spectroscopy. The average positron lifetime and electron momentum (energy) S parameter increases owing to the number of vacancies in the CuO lattice upon doping and decreases with increasing temperature. The migration of vacancies from grain to grain boundary region is observed at 600°C annealed samples. At 800 °C, the overall behavior of lifetime value denotes that the vacancy type defect is recovered, cluster vacancy and microvoids exists with reducing size. The photocatalytic performance of undoped and Tb doped CuO on degradation of methylene blue (MB) and methyl orange (MO) is investigated under visible light for two different lamp power and dye concentration. The influence of annealing temperature and dopant ion on the efficiency is also elaborated. Enhanced photocatalytic efficiency in Tb doped CuO is observed upon annealing. X-ray photoelectron spectroscopy (XPS) result indicates that the valence states of Cu, O and Tb ions exist at the surface of the particles. Brunauer–Emmett–Teller N2 adsorption–desorption analyses were employed to characterize specific surface area and porosity of Tb doped CuO. The doped CuO with pore size of about ∼34nm have a surface area of 16–28m2/g. The surface area effect plays an important role in the enhanced catalytic performance on Tb doped catalysts.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.09.013
       
  • Synthesis and characterization of novel magnetically separable
           NiFe2O4@AlMCM-41-Cu2O core-shell and its performance in removal of dye
    • Authors: Sh. Sohrabnezhad; M. Rezaeimanesh
      Pages: 3039 - 3048
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Sh. Sohrabnezhad, M. Rezaeimanesh
      The synthesis of magnetic NiFe2O4@AlMCM-41-Cu2O core-shell as a new class of visible light driven photocatalyst was suggested. The magnetic NiFe2O4 core was prepared by solvothermal method. The intermediate AlMCM-41 shell was prepared by the method of liquid crystal templating mechanism and subsequently cuprous oxide (Cu2O) nanoparticles (NPs) were synthesized in NiFe2O4@AlMCM-41core-shell via colloidal chemistry approach. The properties of prepared magnetic core-shell were characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), nitrogen adsorption–desorption measurement and vibration sample magnetometer (VSM). Based on EDX results, the weight percentage (wt%) of NiFe2O4 core, MCM-41 shell and Cu2O NPs were calculated to be 68.89, 30.55 and 0.56%, respectively. It consisted of mesoporous structure with a surface area of 687.00m2 g−1, an average pore size of 2.95nm and possessed excellent magnetic properties of 4.74emu g−1. The TEM results indicated that the NiFe2O4 as core were regular spheres with diameter of 68nm, and the average thickness of AlMCM-41 shells was ∼35nm. The particles size of Cu2O incorporated in core-shell was less than 5nm. The photocatalytic activity was evaluated under visible light irradiation using the removal of methylene blue (MB) dye as a model reaction. The removal rate of MB achieved up to 90% after 60min under visible light irradiation, and the NiFe2O4@AlMCM-41-Cu2O can be recycled and reused.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.09.014
       
  • Intensification of vibration mixing of particulate solids by means of
           multi-layer loading of components
    • Authors: Vadim Mizonov; Ivan Balagurov; Henri Berthiaux; Cendrine Gatumel
      Pages: 3049 - 3055
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Vadim Mizonov, Ivan Balagurov, Henri Berthiaux, Cendrine Gatumel
      The objective of the study is to show how initial distribution of dissimilar particulate components influences the mixing time and mixture quality. The dissimilar components have a tendency to segregate in one another, and it is impossible to achieve the perfect mixture of them in industrial settings. Nevertheless, the situation can be improved if the components are loaded as a sequence of several sandwiches, each of these sandwiches containing layers of components that are proportional to their share in the mixture. In this case, a sort of pre-mixing occurs while still at the loading stage – which allows reducing the optimum mixing time and increasing the homogeneity of the mixture. The theory of Markov chains was used to simulate the mixing kinetics. It is shown that the number of loaded sandwiches has a very strong influence on the process efficiency. A loading device that can effectively realize multi-layer loading is proposed. The mixing kinetics for ternary mixture of glass beads was investigated experimentally at a lab scale vibration mixer. A one-time loading and a two-sandwich loading were compared. It was shown that the optimum mixing time and non-homogeneity of the mixture were reduced by half in the latter case.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.09.016
       
  • Mechanochemical processing and microstructural characterization of pure
           Fe2B nanocrystals
    • Authors: Tuncay Simsek; Mustafa Baris; Bora Kalkan
      Pages: 3056 - 3062
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Tuncay Simsek, Mustafa Baris, Bora Kalkan
      The results of current investigation demonstrate that mechanochemical processing can be used to synthesize high purity Fe2B nanocrystals by selecting well-optimized milling conditions, reaction paths and proper starting materials. Microstructure, phase analyses, specific surface area, and magnetic properties of the synthesized nanocrystals were examined by using X-ray diffraction/spectroscopy, electron microscopy, nitrogen adsorption–desorption methods following Brunauer-Emmett-Teller equation and vibrating sample magnetometer techniques, respectively. Removal of MgO impurity phase by leaching the resulting powder in the acetic acid solution yielded single phase Fe2B nanocrystals with the crystallite size and specific surface area of 12.5nm and 29m2/g, respectively. Magnetization results clearly indicated the ferromagnetic behavior of Fe2B nanocrystals with saturation magnetization observed around 96.26emu·g−1. Electron microscope images revealed coaxial/spherical powder shape and morphology of the single-phase Fe2B nanocrystals.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.09.017
       
  • Characterization of mixing performance in a microreactor and its
           application to the synthesis of porous coordination polymer particles
    • Authors: Satoshi Watanabe; Shuji Ohsaki; Akiko Fukuta; Tatsuya Hanafusa; Kento Takada; Hideki Tanaka; Taisuke Maki; Kazuhiro Mae; Minoru T. Miyahara
      Pages: 3104 - 3110
      Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11
      Author(s): Satoshi Watanabe, Shuji Ohsaki, Akiko Fukuta, Tatsuya Hanafusa, Kento Takada, Hideki Tanaka, Taisuke Maki, Kazuhiro Mae, Minoru T. Miyahara
      Here we quantitatively evaluated the mixing performance of a tailor-made microreactor with central-collision type through the iodide/iodate chemical test reaction, and applied the microreactor to the synthesis of zeolitic imidazolate framework-8 (ZIF-8), which is a subclass of porous coordination polymers (PCPs) or metal organic frameworks (MOFs). The chemical test reaction demonstrated excellent mixing performance of the microreactor with a characteristic mixing time shorter than 1ms, which is approximately 100 times faster than those of a batch reactor and a millimeter-sized Y-shaped mixer. Taking advantage of the rapid and uniform mixing, the microreactor successfully produced ZIF-8 particles with high reproducibility by simply mixing aqueous solutions of zinc nitrate and 2-methylimidazole. The synthesis at room temperature resulted in ZIF-8 particles with chamfered cube shape, while a lower temperature of 5°C produced raspberry-type spherical particles. We confirmed that prepared ZIF-8 particles have BET surface area of ∼1500m2/g and exhibit the gate adsorption behavior caused by the structural transition of the ZIF-8 framework.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.09.005
       
  • Utilization of incineration fly ash from biomass power plants for zeolite
           synthesis from coal fly ash by microwave hydrothermal treatment
    • Authors: Tomonori Fukasawa; Akira Horigome; Takayuki Tsu; Achmad Dwitama Karisma; Norio Maeda; An-Ni Huang; Kunihiro Fukui
      Pages: 92 - 98
      Abstract: Publication date: Available online 4 November 2017
      Source:Advanced Powder Technology
      Author(s): Tomonori Fukasawa, Akira Horigome, Achmad Dwitama Karisma, Norio Maeda, An-Ni Huang, Kunihiro Fukui
      Potassium-type zeolite (K-zeolite) was synthesized from coal fly ash and woody biomass incineration ash by microwave hydrothermal treatment. The woody biomass incineration ash was discharged from a biomass power plant, and extracted solutions of the material had a pH range of 11.5–13.0 and a high potassium concentration; therefore, it could be employed to replace the KOH solution that is typically used in the synthesis of K-zeolites. Consequently, we successfully synthesized a K-zeolite containing phillipsite phases from coal fly ash using extracted solutions obtained from biomass incineration fly ash. The ammonium adsorption capacity of the K-zeolite synthesized by microwave hydrothermal treatment was comparable to that of K-zeolite synthesized by oil-bath hydrothermal treatment (external heating). We also confirmed that the microwave heating method could shorten the K-zeolite synthesis time compared to that required when using oil-bath heating.
      Graphical abstract image

      PubDate: 2017-11-10T08:37:52Z
      DOI: 10.1016/j.fuproc.2017.06.023
       
  • Nigella arvensis leaf extract mediated green synthesis of silver
           nanoparticles: Their characteristic properties and biological efficacy
    • Authors: Azam Chahardoli; Naser Karimi; Ali Fattahi
      Abstract: Publication date: Available online 15 November 2017
      Source:Advanced Powder Technology
      Author(s): Azam Chahardoli, Naser Karimi, Ali Fattahi
      In the present study, the potential of aqueous leaf extract of Nigella arevensis for biosynthesis of silver nanoparticles (AgNPs) was evaluated. The formation of AgNPs was confirmed by color changes and UV–visible spectroscopy, which showed absorbance maxima peak at 416 nm. The transmission electron microscope (TEM) image showed the AgNPs to be anisotropic and mostly spherical with sizes in the range of 5–100 nm. Fourier transform infrared (FTIR) analysis indicated that the flavonoids, alkaloids and phenolic groups present in leaf extract were involved in the reduction and capping of phytogenic AgNPs. These nanoparticles showed the cytotoxic effects against H1229 and MCF-7 cancer cell lines with an IC50 value of 10 μg/mL. AgNPs showed insignificant antioxidant properties compared to the crude extract, and it was effective against clinical isolated bacterial strains. Furthermore, the bioderived AgNPs displayed significant catalytic activity against methylene blue. These results confirmed the advantages and applications of these phytogenic AgNPs using the green method in various fields.
      Graphical abstract image

      PubDate: 2017-11-17T13:01:12Z
      DOI: 10.1016/j.apt.2017.11.003
       
  • Dry grinding in planetary ball mills: Evaluation of a stressing model
    • Authors: Christine Burmeister; Larissa Titscher; Sandra Breitung-Faes; Arno Kwade
      Abstract: Publication date: Available online 11 November 2017
      Source:Advanced Powder Technology
      Author(s): Christine Burmeister, Larissa Titscher, Sandra Breitung-Faes, Arno Kwade
      Planetary ball mills at laboratory scale are widely used for grinding and alloying processes. However, in contrast to other mill types, no applicable mechanistic model exists to describe the stressing conditions and their effect on particle breakage, so that processes are empirically evaluated so far. Within this study, the stressing conditions are determined by simulations based on the discrete element method including the contact model of Hertz and Mindlin. The contact model parameters are carefully calibrated by a series of experiments, so that it is finally possible to validate the simulation results by comparison of measured and calculated power values. The correlation of stressing conditions and breakage rates of alumina powder demonstrates the effect of stressing on breakage kinetics and breakage mechanism. It allows calculating the active mass in dependence on process parameters by an extension of Schönert’s active mass model. Altogether, the presented stressing model features analytical functions for the mill-related stressing conditions and highlights the importance of stressing intensity as process determining parameter, which defines the required number of material-related stressing events and the specific energy.
      Graphical abstract image

      PubDate: 2017-11-17T13:01:12Z
      DOI: 10.1016/j.apt.2017.11.001
       
  • Effect of flux powder addition on the synthesis of YAG phosphor by
           mechanical method
    • Authors: Kazuaki Kanai; Yoshifumi Fukui; Takahiro Kozawa; Akira Kondo; Makio Naito
      Abstract: Publication date: Available online 10 November 2017
      Source:Advanced Powder Technology
      Author(s): Kazuaki Kanai, Yoshifumi Fukui, Takahiro Kozawa, Akira Kondo, Makio Naito
      In this study, the effect of YF3 as a flux addition on the mechanical processing low temperature synthesis of Ce3+-doped Y3Al5O12 (YAG:Ce3+) phosphors for white light emitting diodes of next generation lighting was investigated. The YAG phosphors were synthesized by the mechanical method using an attrition-type mill without any extra-heat assistance. When YF3 was added at 10 mass% to the raw powder materials and 10 min processed, the synthesis of YAG:Ce3+ was favorably achieved at the vessel temperature of 230 °C. The internal quantum yield of YAG:Ce3+ phosphor was evaluated by a quantum yield measurement device. The synthesized YAG:Ce3+ phosphor revealed the maximum internal quantum yield of 55%.
      Graphical abstract image

      PubDate: 2017-11-17T13:01:12Z
      DOI: 10.1016/j.apt.2017.11.002
       
  • Modeling thermal conductivity enhancement of metal and metallic oxide
           nanofluids using support vector regression
    • Authors: Ibrahim O. Alade; Tajudeen A. Oyehan; Idris K. Popoola; Sunday O. Olatunji; Bagudu Aliyu
      Abstract: Publication date: Available online 10 November 2017
      Source:Advanced Powder Technology
      Author(s): Ibrahim O. Alade, Tajudeen A. Oyehan, Idris K. Popoola, Sunday O. Olatunji, Bagudu Aliyu
      Enhancing thermal conductivity of nanofluids is an important objective in heat transfer applications. Experimental measurement of thermal conductivity is time consuming, laborious and expensive. One of the common ways to address these limitations involves developing theoretical models to study thermo-physical properties of nanofluid. However, most classical and empirical models fail in predicting experimental results with good precision. In this study, we developed support vector regression (SVR) models that are capable of predicting the thermal conductivity enhancement for metallic and metallic-oxide nanofluids. The accuracy and reliability of the developed models were assessed using statistical parameters such as correlation coefficient (R2), root mean square error (RMSE) and mean absolute error (MAE). The models were characterized with very high correlation coefficients of 99.3 and 96.3% for the metallic and metallic oxide nanofluids, respectively. While the RMSE obtained were 1.11 and 1.33 for the metallic and metallic oxide nanofluids, respectively. In addition, the results of the models were compared with Hamilton-Crosser (HC) model and other empirical models. The SVR models performed much better than all the models examined. Furthermore, the effects of temperature, volume fractions, nanoparticle size & type and basefluids types were correlated with experimental data in order to assess the performance of the developed models. The results indicate that SVR predictions were accurate and better than common theoretical models.
      Graphical abstract image

      PubDate: 2017-11-10T08:37:52Z
      DOI: 10.1016/j.apt.2017.10.023
       
  • Experimental study on moldability and segregation of Inconel 718
           feedstocks used in low-pressure powder injection molding
    • Authors: V. Demers; F. Fareh; S. Turenne; N. Demarquette; O. Scalzo
      Abstract: Publication date: Available online 8 November 2017
      Source:Advanced Powder Technology
      Author(s): V. Demers, F. Fareh, S. Turenne, N. Demarquette, O. Scalzo
      Moldability and segregation of feedstock are linked to the rheological behavior of the powder-binder mixture. In this study, the impact of binders on viscosity and segregation of feedstocks was investigated. The experiments were conducted on several feedstocks obtained by mixing Inconel 718 powder with paraffin wax-based binder systems. The viscosity of feedstocks was measured by a rotational rheometer while the segregation within green parts was evaluated using a thermogravimetric analyzer. It was demonstrated that the variation in solid loading within a molded part can be measured with a sensitivity of at least ±0.25 vol% of powder. The results indicated that the predominant powder-binder separation appears clearly at the top and the bottom of the molded part. It was also shown that the viscosity profiles of feedstocks and the intensity of segregation depends significantly on the binder constituents used in feedstock formulation. The mixture containing only paraffin wax produced the best trade-off between high moldability and low segregation for an injection process requiring an extended time range between injection and solidification of the part (e.g. up to 10 min). For a short processing time (e.g. <1 min spent in molten state), the feedstocks containing paraffin wax with stearic acid or small amount of ethylene vinyl acetate can be also considered as good candidates for LPIM process because their viscosity and segregation potential are relatively low.
      Graphical abstract image

      PubDate: 2017-11-10T08:37:52Z
      DOI: 10.1016/j.apt.2017.10.025
       
  • Formation phenomena of iron oxide-silica composite in microwave plasma and
           DC thermal plasma
    • Authors: Dong-Wook Kim; Satoshi Kodama; Hidetoshi Sekiguchi; Dong-Wha Park
      Abstract: Publication date: Available online 8 November 2017
      Source:Advanced Powder Technology
      Author(s): Dong-Wook Kim, Satoshi Kodama, Hidetoshi Sekiguchi, Dong-Wha Park
      Iron oxide-silica composite was synthesized using atmospheric microwave plasma and DC thermal plasma. There has recently been increasing interest in predicting the final product during vapor phase synthesis using plasma because of difficulty obtaining desirable product. In this study, vapor phase synthesis of iron oxide-silica composite from iron pentacarbonyl (Fe(CO)5) and tetraethyl orthosilicate (SiC8H20O4, TEOS) was conducted using various Fe/Si ratios and different types of plasma to identify the formation mechanism in the Fe-Si-O multi-component system. The morphologies and phase compositions of the synthesized particles were analyzed and compared. The results showed that the Fe/Si ratio and the type of plasma influenced the morphologies and the phase composition. A thermodynamic consideration was introduced to investigate the particle formation phenomena, which could explain the differences induced by varying the Fe/Si ratio and type of plasma. The particle formation mechanism was divided into a condensation step and a diffusion step. At the condensation step, the Fe/Si ratio determined the condensation temperature, which is related to the morphology. At the diffusion step, the quenching rate of the plasma determined the degree of diffusion, which was related to the phase composition and formation of the external layer.
      Graphical abstract image

      PubDate: 2017-11-10T08:37:52Z
      DOI: 10.1016/j.apt.2017.10.024
       
  • Influence of Ni(II), Cu(II) and Cr(III) on the formation, morphology and
           molecular adsorption properties of α-FeOOH rust particles prepared by
           aerial oxidation of neutral Fe(II) solutions
    • Authors: Hidekazu Tanaka; Akira Miyafuji; Tatsuo Ishikawa; Takenori Nakayama
      Abstract: Publication date: Available online 6 November 2017
      Source:Advanced Powder Technology
      Author(s): Hidekazu Tanaka, Akira Miyafuji, Tatsuo Ishikawa, Takenori Nakayama
      To elucidate the role of alloying metals such as Ni, Cu and Cr in weathering steels on the formation of α-FeOOH rust by atmospheric corrosion of the steels in industrial and urban districts, influence of alloying metal ions on the formation, morphology and adsorption properties of α-FeOOH particles synthesized by aerial oxidation of neutral FeSO4 solution was examined. The addition of Cu(II) and Cr(III) dramatically suppresses the crystal growth of α-FeOOH and turns the rod-shaped α-FeOOH particles into nano-sized irregular ones. Besides, increase of amount of added Cr(III) forms the iron oxyhydroxysulfate named as Schwertmannite (Fe8O8(SO4)(OH)6). Whereas, the Ni(II) addition shows no noticeable influence on the growth of α-FeOOH crystal and particles. These results imply that the inhibitory effect of crystal and particle growth of α-FeOOH is in order of Cr(III) > Cu(II) >> Ni(II). The adsorption of CO2 gas on the α-FeOOH particles is impeded by adding Cu(II) and Cr(III). Whereas, the formation of Schwertmannite by adding Cr(III) enhances the CO2 and SO2 adsorption. These results suggest that alloying Cu and Cr in weathering steels inhibit the crystal and particle growth of α-FeOOH to accelerate the formation of protective rust layer composed of fine α-FeOOH and/or Schwertmannite rust particles on the steels in urban and industrial atmosphere.
      Graphical abstract image

      PubDate: 2017-11-10T08:37:52Z
      DOI: 10.1016/j.apt.2017.09.015
       
  • Nanofluid and porous fins effect on natural convection and entropy
           generation of flow inside a cavity
    • Authors: Majid Siavashi; Reza Yousofvand; Saeed Rezanejad
      Abstract: Publication date: Available online 3 November 2017
      Source:Advanced Powder Technology
      Author(s): Majid Siavashi, Reza Yousofvand, Saeed Rezanejad
      In the present study, natural convection of Cu-water nanofluid in a cavity with an array of porous fins on its hot wall has been numerically analyzed using two-phase approach. Use of porous fins, instead of solid ones, improves conduction while could have negligible effect on convection as flow can pass through them. Therefore, the effects of the number of fins and their length on heat transfer enhancement and entropy generation are scrutinized. The study has been conducted for the certain pertinent parameters of Rayleigh number (Ra = 10 4 to 10 6 ), Darcy number (Da = 10 - 1 to 10 - 4 ), and the nanoparticle volume fraction ( φ = 0 to 0.04 ) and results are investigated in terms of heat transfer, entropy generation and performance coefficient (PEC). Numerical results indicate that adding porous fins with a high Darcy number improves heat transfer while fins with a low Darcy number can weaken the convection and decline Nusselt number. In strong flow fields an increase in either the length or the number of fins has insignificant effect on Nu. Also, low concentration of nanoparticles enhances the heat transfer more than high values of nanoparticles. On the other hand, entropy generation decreases by increasing the number of fins and PEC enhances by using porous fins in most of the studied cases. PEC of pure fluid is higher than the nanofluid at low Ra numbers, while opposite fact is observed for high Ra values.
      Graphical abstract image

      PubDate: 2017-11-10T08:37:52Z
      DOI: 10.1016/j.apt.2017.10.021
       
  • Inside Front Cover (Aims &amp; Scope, Editors)
    • Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11


      PubDate: 2017-11-03T08:08:34Z
       
  • Full title (Editorial Board Members)
    • Abstract: Publication date: November 2017
      Source:Advanced Powder Technology, Volume 28, Issue 11


      PubDate: 2017-11-03T08:08:34Z
       
  • Experimental and numerical study of granular medium-rough wall interface
           friction
    • Authors: K. El Cheikh; C. Djelal; Y. Vanhove; P. Pizette; S. Remond
      Abstract: Publication date: Available online 31 October 2017
      Source:Advanced Powder Technology
      Author(s): K. El Cheikh, C. Djelal, Y. Vanhove, P. Pizette, S. Remond
      Wall roughness plays a crucial role in granular medium - rough wall interface friction. In this study, an experimental device has been designed to study the influence of boundary conditions, more specifically wall roughness, on the behavior of sheared granular medium. The study is based on use of an analog model, and consists of simulating roughness by means of notches and grains in the medium by monodisperse beads and on use of a numerical model based on the discrete element method. The test protocol entails displacing at fixed speed notched rods under confined granular medium. Movement of the beads layer near the rods as well as friction of the beads against the rods are both studied herein. Results indicate that the parameter controlling friction at the granular medium - rough wall interface is primarily the depth of beads embedment in surface asperities. The objective of the associated numerical modeling is to supplement the experimental results.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.10.020
       
  • Triboelectric separation of a starch-protein mixture – Impact of
           electric field strength and flow rate
    • Authors: Johann Landauer; Petra Foerst
      Abstract: Publication date: Available online 31 October 2017
      Source:Advanced Powder Technology
      Author(s): Johann Landauer, Petra Foerst
      Triboelectric separation is a method for separating dry particulate systems due to their different electrostatic chargeability. Previous applications are limited to the separation of coarse powders. The aim of the present study is to examine the influence of the flow conditions and the influence of the electric field strength on the separation efficiency of starch and protein particles. Very fine organic powders are separated in a simple bench scale electrostatic separator to extend this technique to powders below 50 µm. The influence of different gas flow rates in the turbulent flow regime on particle charging and subsequent separation is investigated. As an organic model substrate, a mixture of barley starch and whey protein was used. The tribocharger consists of a PTFE charging tube and a rectangular separation chamber where an electric field is applied between two electrodes. The particles are conveyed through the charging tube and charged by frictional contact with the tube wall. It is shown that different gas flow rates at a turbulent flow regime in the charging tube did not change the separation characteristics. In contrast, increasing electrical field strength increases separation efficiency of protein particles regardless of gas flow conditions. The proportion of starch at the anode is the same for all the investigated parameters.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.10.018
       
  • Magnetically recoverable highly efficient visible-light-active
           g-C3N4/Fe3O4/Ag2WO4/AgBr nanocomposites for photocatalytic degradations of
           environmental pollutants
    • Authors: Mitra Mousavi; Aziz Habibi-Yangjeh
      Abstract: Publication date: Available online 31 October 2017
      Source:Advanced Powder Technology
      Author(s): Mitra Mousavi, Aziz Habibi-Yangjeh
      Herein, magnetically recoverable g-C3N4/Fe3O4/Ag2WO4/AgBr (gCN/M/AgW/AgBr) nanocomposites, as greatly efficient visible-light-active photocatalysts, were fabricated by successive decoration of Fe3O4, Ag2WO4, and AgBr over g-C3N4 (gCN) and they were characterized by XRD, EDX, SEM, TEM, HRTEM, UV–vis DRS, FT-IR, PL, TG, and VSM analysis. Visible-light-induced photocatalytic performances were studied by degradations of RhB, MB, MO, and fuchsine pollutants. It was confirmed that the nanocomposites are effective in the reduction of e−/h+ recombination through the matched interactions between energy bands of gCN, Fe3O4, Ag2WO4, and AgBr semiconductors. The highest photocatalytic degradation efficiency was observed for the gCN/M/AgW/AgBr (30%) nanocomposite when it was refluxed for 30 min. Activity of this nanocomposite is almost 21, 41, 94, and 10-folds greater than those of the gCN toward the degradations of RhB, MB, MO, and fuchsine pollutants, respectively. Additionally, a mechanism for the superior photocatalytic performances was proposed using reactive species scavenging experiments and characterization results.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.10.016
       
  • Synthesis of -cordierite nanoparticles from bentonite using
           thermal shock assisted solid-state reaction method
    • Authors: Cheraghi Shoushtarizadeh; Malekfar Alizadeh
      Abstract: Publication date: Available online 31 October 2017
      Source:Advanced Powder Technology
      Author(s): A. Cheraghi, H. Shoushtarizadeh, R. Malekfar, O. Alizadeh
      For the first time, we believe, nanosized <alpha>-cordierite glass-ceramics are produced using bentonite, talc, alumina, and kaolin as the raw materials and applying thermal shock to the precursor powders and sintered at 1100, 1200, and 1300 °C. A combination of a furnace at about 800 °C and liquid nitrogen was used for the applied thermal shock with a total temperature difference of about 1000 °C. The effects of thermal shock process and sintering temperature on <alpha>-cordierite formation and microstructure have been investigated. The results show that <alpha>-cordierite was formed above 1160 °C and its weight ratio increased continuously as sintered temperature increased to 1300 °C. By increasing the temperature, <alpha>-cordierite nanoparticles grain sizes and the intensity of FTIR peaks started to increase. Applying thermal shock to precursor powders reduced the grain size of each consisting mineral and resulted in nanosized <alpha>-cordierite powder.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
       
  • Synthesis of silver nanoparticles in an eco-friendly way using Phyllanthus
           amarus leaf extract: Antimicrobial and catalytic activity
    • Authors: B. Ajitha; Y. Ashok Kumar Reddy; Hwan-Jin Jeon; Chi Won Ahn
      Abstract: Publication date: Available online 31 October 2017
      Source:Advanced Powder Technology
      Author(s): B. Ajitha, Y. Ashok Kumar Reddy, Hwan-Jin Jeon, Chi Won Ahn
      In the present study, silver nanoparticles (AgNPs) with a flower-like structure were synthesized through an easy, rapid and eco-friendly pathway using Phyllanthus amarus leaf extract. The obtained AgNPs were characterized using ultraviolet–visible (UV–Vis) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and transmission electron microscopy (TEM). In addition, the antimicrobial and catalytic activities of the bio-synthesized AgNPs were carried out. Our results indicated that the concentration of the Ag precursor and the volume of the leaf extract played key roles in the formation of the flower-shaped AgNPs. Morphology study confirms the shape of the obtained bio-AgNPs as flower like structure. This study also showed the presence of clear capping layers surrounding and apparently interacting with the nanoparticles. Moreover, our studies indicated this interaction to involve bio-organic capping agents in the leaf extract. UV–Vis absorption spectra confirmed the formation of AgNPs with an optimized size. The zeta (ζ) potential of the AgNPs attests the stability of the nanoparticles. FTIR spectra provided evidence for the presence of biomolecules responsible for the reduction as well as capping of the AgNPs. Finally, the bio-synthesized AgNPs were shown to be an excellent microbial activity against the selected pathogens and enhanced catalyst of the reduction of rhodamine B.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.10.015
       
  • Facile preparation of Ce-doped TiO2/diatomite granular composite with
           enhanced photocatalytic activity
    • Authors: Yan Chen; Qiong Wu; Chao Zhou; Qiutong Jin
      Abstract: Publication date: Available online 31 October 2017
      Source:Advanced Powder Technology
      Author(s): Yan Chen, Qiong Wu, Chao Zhou, Qiutong Jin
      Granule-shaped Ce-doped TiO2/diatomite (GCTD) hybrid was prepared via sol-gel method. The physicochemical properties of this hybrid were characterized by various analytical methods. As carrier, diatomite was conducive to the dispersion of TiO2 nanoparticles, hindering their agglomeration process. Compared to TiO2, GCTD showed visible-light-driven photoactivity, which was evaluated by the degradation of oxytetracycline (OTC) and disinfection of three bacteria (Escherichia coli, Staphylococcus aureus and Klebsiella pneumonia) under visible light. The porous diatomite enhanced the photoactivity of TiO2 via the adsorption towards target pollutants. The reusability experiment was conducted for 5 times, and the results showed that GCTD exhibited good photo-stability and reusability.
      Graphical abstract image

      PubDate: 2017-11-03T08:08:34Z
      DOI: 10.1016/j.apt.2017.10.017
       
  • Unsteady MHD heat and mass transfer of a non-Newtonian nanofluid flow of a
           two-phase model over a permeable stretching wall with heat
           generation/absorption
    • Authors: Mohamed R. Eid; Kasseb L. Mahny
      Abstract: Publication date: Available online 9 October 2017
      Source:Advanced Powder Technology
      Author(s): Mohamed R. Eid, Kasseb L. Mahny
      The combined effects of magnetic field and heat generation or absorption on unsteady boundary-layer convective heat and mass transfer of a non-Newtonian nanofluid over a permeable stretching wall have been addressed. A power-law model includes Brownian motion and thermophoresis influences are utilized for non-Newtonian nanofluids with a convective boundary condition. The non-linear governing equations are reduced into ODEs by similarity transformations and solved numerically by using Runge-Kutta-Fehlberg 4th–5th order numerical method (RKF45) with shooting technique. The different physical parameters effects such as the magnetic parameter ( M ) , the heat source/sink parameters ( λ ) , the unsteadiness parameter ( A ) , the generalized Prandtl and Lewis numbers on the dimensionless velocity, temperature and nanoparticles volume fraction, in addition to the skin friction, local Nusselt and Sherwood numbers are analyzed. It is reached that the thermal and concentration boundary-layer thickness has higher values with the increasing of magnetic field and heat generation in the case of a pseudo-plastic nanofluid than others.
      Graphical abstract image

      PubDate: 2017-10-12T06:48:45Z
      DOI: 10.1016/j.apt.2017.09.021
       
  • Synthesis of heterogeneous Ag-Cu bimetallic monolith with different mass
           ratios and their performances for catalysis and antibacterial activity
    • Authors: Manisha Sharma; Satyajit Hazra; Soumen Basu
      Abstract: Publication date: Available online 9 October 2017
      Source:Advanced Powder Technology
      Author(s): Manisha Sharma, Satyajit Hazra, Soumen Basu
      Combination of two or more metallic particles along with high surface area and porous structure exhibits enhanced catalytic as well as antibacterial activity. Here, Ag-Cu bimetallic monoliths were synthesized by nanocasting method by strictly adjusting the molar ratio of Ag-Cu. This work is mainly focused on the effect of molar ratio (Ag:Cu) on surface area (14–110 m2/g) and porous size of bimetallic monoliths, which has great influence on enhancement of catalytic and antimicrobial activity. The catalytic activity of bimetallic Ag-Cu monoliths was evaluated for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) in the presence of excess NaBH4. The reaction rate follows pseudo-first order for reduction of 4-NP with a reduction efficacy of ∼95%. The effect of Ag:Cu molar ratio and reaction conditions on the rate of reaction were investigated. In comparison with novel monometallic silver monoliths, bimetallic Ag-Cu monoliths exhibit high catalytic performance on the reduction of 4-NP. These heterogeneous catalysts were effortlessly recovered and reused (up to 8 cycles) after completion of catalytic reaction. As bimetallic Ag-Cu particles are well-known for antibacterial activity, so bactericidal properties of synthesized monoliths are tested against E. coli and B. subtilis bacteria by minimum inhibitory concentration method (MIC). The calculated EC50 (half maximum effective concentration) after completion of incubation period, against E. coli and B. subtilis were 22.87 ± 0.015 and 23.33 ± 0.09 respectively using Ag/Cu-3 bimetallic monolith.
      Graphical abstract image

      PubDate: 2017-10-12T06:48:45Z
      DOI: 10.1016/j.apt.2017.09.023
       
  • Synthesizing amorphous Ni-P micro-/nano-composites with perfect roundness
           or embryo-like structures
    • Authors: Meifeng Hao; Mingshu Xiao; Yuhua Yan; Yuqing Miao
      Abstract: Publication date: Available online 9 October 2017
      Source:Advanced Powder Technology
      Author(s): Meifeng Hao, Mingshu Xiao, Yuhua Yan, Yuqing Miao
      The ability to manipulate the morphology and structure of core-shell materials on a micro/nano scale can further control their physical and chemical properties, leading to the wider applications. Herein, the conventional electroless deposition technique for metal alloy films on solid substrates was adapted to synthesize the Ni-P micro/nano-composites in solution under high temperature and high pressure through the hydrothermal method. The obtained amorphous Ni-P composites exhibit perfect roundness with the multilayer structure of concentric circle. By controlling the erosion condition in HNO3, the special embryo-like structure was obtained where a solid microsphere is encircled by a layer of hollow globular ultrathin film with the thickness smaller than 50 nm. A round hole opens on the surface of the embryo-like structure. The reaction or formation mechanism was tentatively discussed. The methods can be used to produce the special micro-/nano-structures of metal phosphide.
      Graphical abstract image

      PubDate: 2017-10-12T06:48:45Z
      DOI: 10.1016/j.apt.2017.09.025
       
  • A comprehensive study of the performance of a heat pipe by using of
           various nanofluids
    • Authors: Hossein Kavusi; Davood Toghraie
      Abstract: Publication date: Available online 7 October 2017
      Source:Advanced Powder Technology
      Author(s): Hossein Kavusi, Davood Toghraie
      In this paper, a two-dimensional numerical model is developed to simulate the performance of a heat pipe using various nanofluids. The effect of different nanofluids (prepared using alumina, copper oxide, and silver nanoparticles) at different concentrations and particle diameters on the performance of heat pipe is also studied by through finite volume method. The obtained results show that using a nanofluid instead of water leads to the increased thermal efficiency and reduction in heat at wall of the heat pipe. Also, the temperature difference between the evaporator and the condenser is a function of input power; this means that by an increase in the input capacity, the temperature difference between the evaporator and the condenser increases. It was observed that the use of nanofluid reduces the axial-flow pressure of the fluid inside the wick. As a result, the transmission of fluid flow inside the wick from the condenser to the evaporator is easily done with the cost of using a nanofluid. Moreover, with an increase in thermal capacity, fluid pressure drop becomes maximum and thus temperature difference between the evaporator and the condenser increases.
      Graphical abstract image

      PubDate: 2017-10-12T06:48:45Z
      DOI: 10.1016/j.apt.2017.09.022
       
 
 
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