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ENGINEERING (1199 journals)                  1 2 3 4 5 6 | Last

Showing 1 - 200 of 1205 Journals sorted alphabetically
3 Biotech     Open Access   (Followers: 7)
3D Research     Hybrid Journal   (Followers: 19)
AAPG Bulletin     Full-text available via subscription   (Followers: 5)
AASRI Procedia     Open Access   (Followers: 15)
Abstract and Applied Analysis     Open Access   (Followers: 3)
Aceh International Journal of Science and Technology     Open Access   (Followers: 2)
ACS Nano     Full-text available via subscription   (Followers: 217)
Acta Geotechnica     Hybrid Journal   (Followers: 6)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 2)
Acta Scientiarum. Technology     Open Access   (Followers: 3)
Acta Universitatis Cibiniensis. Technical Series     Open Access  
Active and Passive Electronic Components     Open Access   (Followers: 7)
Adaptive Behavior     Hybrid Journal   (Followers: 10)
Adıyaman Üniversitesi Mühendislik Bilimleri Dergisi     Open Access  
Adsorption     Hybrid Journal   (Followers: 4)
Advanced Engineering Forum     Full-text available via subscription   (Followers: 5)
Advanced Science     Open Access   (Followers: 4)
Advanced Science Focus     Free   (Followers: 3)
Advanced Science Letters     Full-text available via subscription   (Followers: 5)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 7)
Advanced Synthesis & Catalysis     Hybrid Journal   (Followers: 17)
Advances in Artificial Neural Systems     Open Access   (Followers: 4)
Advances in Calculus of Variations     Hybrid Journal   (Followers: 2)
Advances in Catalysis     Full-text available via subscription   (Followers: 5)
Advances in Complex Systems     Hybrid Journal   (Followers: 7)
Advances in Engineering Software     Hybrid Journal   (Followers: 25)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 14)
Advances in Fuzzy Systems     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 9)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 19)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 23)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 8)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 28)
Advances in Operations Research     Open Access   (Followers: 11)
Advances in OptoElectronics     Open Access   (Followers: 5)
Advances in Physics Theories and Applications     Open Access   (Followers: 12)
Advances in Polymer Science     Hybrid Journal   (Followers: 40)
Advances in Porous Media     Full-text available via subscription   (Followers: 4)
Advances in Remote Sensing     Open Access   (Followers: 35)
Advances in Science and Research (ASR)     Open Access   (Followers: 6)
Aerobiologia     Hybrid Journal   (Followers: 1)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 4)
AIChE Journal     Hybrid Journal   (Followers: 28)
Ain Shams Engineering Journal     Open Access   (Followers: 5)
Akademik Platform Mühendislik ve Fen Bilimleri Dergisi     Open Access  
Alexandria Engineering Journal     Open Access   (Followers: 1)
AMB Express     Open Access   (Followers: 1)
American Journal of Applied Sciences     Open Access   (Followers: 27)
American Journal of Engineering and Applied Sciences     Open Access   (Followers: 11)
American Journal of Engineering Education     Open Access   (Followers: 9)
American Journal of Environmental Engineering     Open Access   (Followers: 16)
American Journal of Industrial and Business Management     Open Access   (Followers: 23)
Analele Universitatii Ovidius Constanta - Seria Chimie     Open Access  
Annals of Combinatorics     Hybrid Journal   (Followers: 3)
Annals of Pure and Applied Logic     Open Access   (Followers: 2)
Annals of Regional Science     Hybrid Journal   (Followers: 7)
Annals of Science     Hybrid Journal   (Followers: 7)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2)
Applicable Analysis: An International Journal     Hybrid Journal   (Followers: 1)
Applied Catalysis A: General     Hybrid Journal   (Followers: 6)
Applied Catalysis B: Environmental     Hybrid Journal   (Followers: 8)
Applied Clay Science     Hybrid Journal   (Followers: 4)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 12)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 3)
Applied Nanoscience     Open Access   (Followers: 7)
Applied Network Science     Open Access  
Applied Numerical Mathematics     Hybrid Journal   (Followers: 5)
Applied Physics Research     Open Access   (Followers: 3)
Applied Sciences     Open Access   (Followers: 2)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 4)
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 5)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 4)
Archives of Foundry Engineering     Open Access  
Archives of Thermodynamics     Open Access   (Followers: 7)
Arkiv för Matematik     Hybrid Journal   (Followers: 1)
ASEE Prism     Full-text available via subscription   (Followers: 2)
Asian Engineering Review     Open Access  
Asian Journal of Applied Science and Engineering     Open Access   (Followers: 1)
Asian Journal of Applied Sciences     Open Access   (Followers: 2)
Asian Journal of Biotechnology     Open Access   (Followers: 7)
Asian Journal of Control     Hybrid Journal  
Asian Journal of Current Engineering & Maths     Open Access  
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 8)
Assembly Automation     Hybrid Journal   (Followers: 2)
at - Automatisierungstechnik     Hybrid Journal   (Followers: 1)
ATZagenda     Hybrid Journal  
ATZextra worldwide     Hybrid Journal  
Australasian Physical & Engineering Sciences in Medicine     Hybrid Journal   (Followers: 1)
Australian Journal of Multi-Disciplinary Engineering     Full-text available via subscription   (Followers: 2)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 7)
Avances en Ciencias e Ingeniería     Open Access  
Balkan Region Conference on Engineering and Business Education     Open Access   (Followers: 1)
Bangladesh Journal of Scientific and Industrial Research     Open Access  
Basin Research     Hybrid Journal   (Followers: 3)
Batteries     Open Access   (Followers: 3)
Bautechnik     Hybrid Journal   (Followers: 1)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 23)
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 3)
BER : Manufacturing Survey : Full Survey     Full-text available via subscription   (Followers: 2)
BER : Motor Trade Survey     Full-text available via subscription   (Followers: 1)
BER : Retail Sector Survey     Full-text available via subscription   (Followers: 2)
BER : Retail Survey : Full Survey     Full-text available via subscription   (Followers: 2)
BER : Survey of Business Conditions in Manufacturing : An Executive Summary     Full-text available via subscription   (Followers: 3)
BER : Survey of Business Conditions in Retail : An Executive Summary     Full-text available via subscription   (Followers: 3)
Bharatiya Vaigyanik evam Audyogik Anusandhan Patrika (BVAAP)     Open Access   (Followers: 1)
Biofuels Engineering     Open Access  
Biointerphases     Open Access   (Followers: 1)
Biomaterials Science     Full-text available via subscription   (Followers: 9)
Biomedical Engineering     Hybrid Journal   (Followers: 16)
Biomedical Engineering and Computational Biology     Open Access   (Followers: 13)
Biomedical Engineering Letters     Hybrid Journal   (Followers: 5)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 16)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 31)
Biomedical Engineering: Applications, Basis and Communications     Hybrid Journal   (Followers: 5)
Biomedical Microdevices     Hybrid Journal   (Followers: 8)
Biomedical Science and Engineering     Open Access   (Followers: 3)
Biomedizinische Technik - Biomedical Engineering     Hybrid Journal  
Biomicrofluidics     Open Access   (Followers: 4)
BioNanoMaterials     Hybrid Journal   (Followers: 1)
Biotechnology Progress     Hybrid Journal   (Followers: 39)
Boletin Cientifico Tecnico INIMET     Open Access  
Botswana Journal of Technology     Full-text available via subscription  
Boundary Value Problems     Open Access   (Followers: 1)
Brazilian Journal of Science and Technology     Open Access   (Followers: 2)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 10)
Bulletin of Canadian Petroleum Geology     Full-text available via subscription   (Followers: 14)
Bulletin of Engineering Geology and the Environment     Hybrid Journal   (Followers: 3)
Bulletin of the Crimean Astrophysical Observatory     Hybrid Journal  
Cahiers, Droit, Sciences et Technologies     Open Access  
Calphad     Hybrid Journal  
Canadian Geotechnical Journal     Full-text available via subscription   (Followers: 13)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 40)
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 7)
Case Studies in Thermal Engineering     Open Access   (Followers: 3)
Catalysis Communications     Hybrid Journal   (Followers: 6)
Catalysis Letters     Hybrid Journal   (Followers: 2)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 8)
Catalysis Science and Technology     Free   (Followers: 6)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysis Today     Hybrid Journal   (Followers: 5)
CEAS Space Journal     Hybrid Journal  
Cellular and Molecular Neurobiology     Hybrid Journal   (Followers: 3)
Central European Journal of Engineering     Hybrid Journal   (Followers: 1)
CFD Letters     Open Access   (Followers: 6)
Chaos : An Interdisciplinary Journal of Nonlinear Science     Hybrid Journal   (Followers: 2)
Chaos, Solitons & Fractals     Hybrid Journal   (Followers: 3)
Chinese Journal of Catalysis     Full-text available via subscription   (Followers: 2)
Chinese Journal of Engineering     Open Access   (Followers: 2)
Chinese Science Bulletin     Open Access   (Followers: 1)
Ciencia e Ingenieria Neogranadina     Open Access  
Ciencia en su PC     Open Access   (Followers: 1)
Ciencias Holguin     Open Access   (Followers: 1)
CienciaUAT     Open Access  
Cientifica     Open Access  
CIRP Annals - Manufacturing Technology     Full-text available via subscription   (Followers: 11)
CIRP Journal of Manufacturing Science and Technology     Full-text available via subscription   (Followers: 14)
City, Culture and Society     Hybrid Journal   (Followers: 21)
Clay Minerals     Full-text available via subscription   (Followers: 9)
Clean Air Journal     Full-text available via subscription   (Followers: 2)
Coal Science and Technology     Full-text available via subscription   (Followers: 3)
Coastal Engineering     Hybrid Journal   (Followers: 11)
Coastal Engineering Journal     Hybrid Journal   (Followers: 4)
Coatings     Open Access   (Followers: 2)
Cogent Engineering     Open Access   (Followers: 2)
Cognitive Computation     Hybrid Journal   (Followers: 4)
Color Research & Application     Hybrid Journal   (Followers: 1)
COMBINATORICA     Hybrid Journal  
Combustion Theory and Modelling     Hybrid Journal   (Followers: 13)
Combustion, Explosion, and Shock Waves     Hybrid Journal   (Followers: 13)
Communications Engineer     Hybrid Journal   (Followers: 1)
Communications in Numerical Methods in Engineering     Hybrid Journal   (Followers: 2)
Components, Packaging and Manufacturing Technology, IEEE Transactions on     Hybrid Journal   (Followers: 23)
Composite Interfaces     Hybrid Journal   (Followers: 6)
Composite Structures     Hybrid Journal   (Followers: 252)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 177)
Composites Part B : Engineering     Hybrid Journal   (Followers: 223)
Composites Science and Technology     Hybrid Journal   (Followers: 165)
Comptes Rendus Mécanique     Full-text available via subscription   (Followers: 2)
Computation     Open Access  
Computational Geosciences     Hybrid Journal   (Followers: 12)
Computational Optimization and Applications     Hybrid Journal   (Followers: 7)
Computational Science and Discovery     Full-text available via subscription   (Followers: 2)
Computer Applications in Engineering Education     Hybrid Journal   (Followers: 6)
Computer Science and Engineering     Open Access   (Followers: 17)
Computers & Geosciences     Hybrid Journal   (Followers: 25)
Computers & Mathematics with Applications     Full-text available via subscription   (Followers: 5)
Computers and Electronics in Agriculture     Hybrid Journal   (Followers: 4)
Computers and Geotechnics     Hybrid Journal   (Followers: 8)
Computing and Visualization in Science     Hybrid Journal   (Followers: 6)
Computing in Science & Engineering     Full-text available via subscription   (Followers: 25)
Conciencia Tecnologica     Open Access  
Concurrent Engineering     Hybrid Journal   (Followers: 3)
Continuum Mechanics and Thermodynamics     Hybrid Journal   (Followers: 6)
Control and Dynamic Systems     Full-text available via subscription   (Followers: 8)
Control Engineering Practice     Hybrid Journal   (Followers: 41)
Control Theory and Informatics     Open Access   (Followers: 7)
Corrosion Science     Hybrid Journal   (Followers: 24)
CT&F Ciencia, Tecnologia y Futuro     Open Access  
CTheory     Open Access  

        1 2 3 4 5 6 | Last

Journal Cover Catalysis Letters
  [SJR: 0.777]   [H-I: 94]   [2 followers]  Follow
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1572-879X - ISSN (Online) 1011-372X
   Published by Springer-Verlag Homepage  [2329 journals]
  • High Selectivity of Cyclohexane Dehydrogenation for H 2 Evolution Over
           Cu/SBA-15 Catalyst
    • Authors: Zhijun Xia; Huayan Liu; Hanfeng Lu; Zekai Zhang; Yinfei Chen
      Pages: 1295 - 1302
      Abstract: The effects of metal particle size on catalytic activities of Cu/SBA-15 with different Cu content were investigated for high selectivity of cyclohexane dehydrogenation. Overall, the smaller Cu nanoparticles exhibit higher hydrogen evolution rate or lower active energy barrier. But, even when the smaller CuO nanoparticles have formed on the catalyst with lower Cu content during the calcination, they would be more prone to sinter after reduction. An appropriate Cu content could lead to form amounts of stable and small Cu nanoparticles after high-temperature treatment with the space limitation by ordered channels of SBA-15. Graphical
      PubDate: 2017-06-01
      DOI: 10.1007/s10562-017-2033-5
      Issue No: Vol. 147, No. 6 (2017)
  • Noble-Metal-Free Copper Nanoparticles/Reduced Graphene Oxide Composite: A
           New and Highly Efficient Catalyst for Transformation of 4-Nitrophenol
    • Authors: Lixia Qin; Honglei Xu; Kun Zhu; Shi-Zhao Kang; Guodong Li; Xiangqing Li
      Pages: 1315 - 1321
      Abstract: A noble-metal-free reduced graphene oxide composite, copper nanoparticles (Cu NPs) loaded reduced graphene oxide (Cu/RGO), was prepared via a one-step in-situ reduction method. Furthermore, the catalytic activity of the composite for reduction of 4-nitrophenol (4-NP) was investigated. The results showed that the composite was a highly efficient, stable and low-cost catalyst for transformation of 4-NP. In the composite, Cu NPs acted as the cocatalyst and the RGO acted as the substance of electron transfer. The catalytic mechanism was also suggested. Graphical Copper nanoparticles loaded reduced graphene oxide (Cu/RGO) was prepared via a one-step in-situ reduction method. The Cu/RGO composite exhibited high catalytic activity and good recycle stability for treatment and transformation of 4-nitrophenol. Compared with the similar catalysts, the Cu/RGO composite is a cheaper, stable and highly efficient in practical application.
      PubDate: 2017-06-01
      DOI: 10.1007/s10562-017-2038-0
      Issue No: Vol. 147, No. 6 (2017)
  • Pd–Cu Bimetallic Catalyst on Amidoxime Fiber Realizing an Alternative
           and High-Efficient Cyanation of Aryl Halide
    • Authors: Zhi-Chuan Wu; Quan Yang; Xin Ge; Yi-Ming Ren; Ren-Chun Yang; Ting-Xian Tao
      Pages: 1333 - 1338
      Abstract: The reaction of aryl halide cyanation through safe, efficient and stable pathway is of great significance in the industry of fine chemicals. Here, using potassium ferrocyanide and Pd–Cu bimetallic catalyst supported on amidoxime fibers (Cu(I)Pd(II)-AOFs), we propose an alternative reaction pathway for aryl halide cyanation. It shows that a high catalytic activity of cyanation is over 90% for aryl bromides/iodides and about 50% for aryl chlorides at reaction time (2 h), heating reflux in DMAc, in air. The morphology, composition and structure of the prepared catalysts are characterized by SEM, XRD and XPS. The changes of binding energy (N1s O1s Pd3d) show that Pd(II) ions is coordinated with the –NH2/–OH in AOFs, and that Pd(0) and Cu(II) are detected on the surface of AOFs after reaction. These results indicate that CuI makes Pd2+ reduce to Pd0 so as to produce activity central, and that AOFs coordination action is to enhance Pd0 central activity, and that CuI promotes the cyanide ion in potassium ferrocyanide dissociation. A high-efficient cyanation of aryl halide is successfully achieved by the synergistic action with the three actions. Graphical
      PubDate: 2017-06-01
      DOI: 10.1007/s10562-017-2040-6
      Issue No: Vol. 147, No. 6 (2017)
  • A New Route for the Synthesis of Ammonium Thiotungstate, a Catalyst
    • Authors: K. Vega-Granados; M. Del Valle; A. Licea-Claverie; G. Alonso-Núñez; R. Romero-Rivera; L. López-Sosa; M. Avalos-Borja; J. Cruz-Reyes
      Pages: 1339 - 1346
      Abstract: Ammonium thiotungstate (ATT), (NH4)2WS4, is prepared by a new method using (NH4)2S, and compared with ATT obtained by conventional sulfidation with H2S(g). The XRD spectra of both samples are very similar to the simulated spectrum of ATT. UV–Vis and FT-IR spectra of both samples have characteristic bands for ATT. SEM micrographs show a similar morphology between the samples. TGA-DTA curves of both samples are the same, corresponding to the decomposition of ATT. Analytical results thus show that the ATT obtained by this new, safer, method is the same as the ATT obtained by sulfidation with poisonous H2S(g). The HDS activity of the WS2 catalyst derived from ATT prepared by the new method described here is equivalent to that of ATT prepared by the conventional method. Graphical
      PubDate: 2017-06-01
      DOI: 10.1007/s10562-017-2041-5
      Issue No: Vol. 147, No. 6 (2017)
  • Synthesis of Ditetrahydrofurfuryl Carbonate as a Fuel Additive Catalyzed
           by Aminopolycarboxylate Ionic Liquids
    • Authors: Wei Huang; Duan-Jian Tao; Feng-Feng Chen; Wei Hui; Jia Zhu; Yan Zhou
      Pages: 1347 - 1354
      Abstract: A new series of aminopolycarboxylate ionic liquids were designed, synthesized, and applied for efficient and selective synthesis of ditetrahydrofurfuryl carbonate (DTC). Tetraethylammonium nitrilotriacetate ([N2222]3[NTA]) was demonstrated to show the best catalytic performance, in which DTC could be obtained at a yield of 80% under optimum conditions. Graphical
      PubDate: 2017-06-01
      DOI: 10.1007/s10562-017-2043-3
      Issue No: Vol. 147, No. 6 (2017)
  • Controllable Synthesis of Ru Nanocrystallites on Graphene Substrate as a
           Catalyst for Ammonia Synthesis
    • Authors: Jiemin Zhao; Jiande Zhou; Mingwei Yuan; Zhixiong You
      Pages: 1363 - 1370
      Abstract: Controllable synthesis of Ru nanocrystallites on graphene substrate using polyol methods was reported herein. The zeta potential of graphene oxide dispersed in polyols is found to play a key role in tailoring the morphology and oxidation state of Ru nanocrystallites on graphene substrate. Negatively charged graphene oxide can coordinate with Ru3+ precursors via its carboxylic acid groups to form C–O–Ru complexes, leading to the epitaxial growth of hexagonally shaped cationic ruthenium nanocrystallites of 3–5 nm, which shows high catalytic activities for ammonia synthesis as expected; whereas positively charged graphene oxides can only interact with Ru3+ precursors via Van der Waals forces, resulting in a significant agglomeration of metallic ruthenium nanoparticles and thus a low catalytic performance. Graphical The morphology and oxidation state of ruthenium nanocrystallites supported on graphene substrate, thus the catalytic activity for ammonia synthesis, can be tailored by tuning the zeta potential of graphene oxide dispersed in polyols.
      PubDate: 2017-06-01
      DOI: 10.1007/s10562-017-2045-1
      Issue No: Vol. 147, No. 6 (2017)
  • Deep Eutectic Solvent/Lipase: Two Environmentally Benign and Recyclable
           Media for Efficient Synthesis of N -Aryl Amines
    • Authors: Preeti Lalit Pant; Ganapati Subray Shankarling
      Pages: 1371 - 1378
      Abstract: Deep eutectic solvent (DES)/lipase catalyzed efficient synthesis of N-aryl amines from electron deficient aryl chlorides and amines at ambient temperature is reported. Its significant features include excellent yields of products, use of biodegradable, non-toxic and recyclable catalysts, thereby avoiding toxic metal catalyst/solvents making these protocols environmentally benign. Graphical
      PubDate: 2017-06-01
      DOI: 10.1007/s10562-017-2046-0
      Issue No: Vol. 147, No. 6 (2017)
  • Iodosobenzoic Acid (IBA) Catalysed Benzylic and Aromatic C–H
    • Authors: Vittam Hima Bindu; Sai Prathima Parvathaneni; Vaidya Jayathirtha Rao
      Pages: 1434 - 1440
      Abstract: A metal-free reusable hypervalent iodine(III) reagent is employed as a stable catalyst for the selective oxidation of active methylenes, indoles and styrene C–H bond to corresponding carbonyl compounds. From both economic and environmental point of view use of 2-Iodosobenzoic acid for oxidations replacing metals, makes the reaction interesting. Graphical A metal-free reusable hypervalent iodine(III) reagent is employed as a stable catalyst for the selective oxidation of active methylenes, Indoles and styrene C–H bond to corresponding carbonyl compounds. From both an economic and environmental point of view use of oxygen as the oxidant, makes the reaction interesting.
      PubDate: 2017-06-01
      DOI: 10.1007/s10562-017-2050-4
      Issue No: Vol. 147, No. 6 (2017)
  • High-Surface Area Ceria-Zirconia Films Prepared by Atomic Layer Deposition
    • Authors: Tzia Ming Onn; Sheng Dai; Jiayao Chen; Xiaoqing Pan; George W. Graham; Raymond J. Gorte
      Pages: 1464 - 1470
      Abstract: Ceria-zirconia, solid solutions were prepared as thin, dense films on a 130-m2/g γ-Al2O3 by Atomic Layer Deposition (ALD) for use as catalyst supports. Ce0.5Zr0.5O2 solid solutions were grown by alternating between Ce(TMHD)4 and Zr(TMHD)4 precursors during ALD cycles. 50 precursor-oxidation cycles resulted in a material with 0.77 g Ce0.5Zr0.5O2 per g γ-Al2O3, corresponding to an average film thickness of 1.0 nm. The lattice parameter obtained from XRD was consistent with formation of a solid solution and scanning transmission electron microscopy (STEM) showed the mixed oxide was uniformly deposited. When impregnated with 1-wt% Pd, the ALD-prepared Ce0.5Zr0.5O2-γ-Al2O3 catalyst showed CO-oxidation activity similar to Pd on bulk Ce0.5Zr0.5O2; however, the ALD-prepared sample maintained much of its surface area and catalytic activity when heated to temperatures up to 1273 K. Graphical
      PubDate: 2017-06-01
      DOI: 10.1007/s10562-017-2053-1
      Issue No: Vol. 147, No. 6 (2017)
  • The Induction Period and Novel Active Species in Zn(OAc) 2 Catalyzed
           Synthesis of Aromatic Carbamates
    • Authors: Fang Li; Xi Wang; Hongqin Li; Shufang Wang; Wei Xue; Yanji Wang
      Pages: 1478 - 1484
      Abstract: Zn(OAc)2 is known to exhibit excellent catalytic activity for aromatic carbamate synthesis by the reaction of aromatic amine and dimethyl carbonate (DMC). It is determined that an induction period exists during the synthesis of dimethyl-4,4′-methylenediphenyl dicarbamate (MDC) and methyl N-phenyl carbamate (MPC), although this period is more evident in the case of MDC. Zn(OAc)2 is able to catalyze the reaction of amine and DMC, but also react with DMC to form Zn4O(OAc)6, which also shows excellent catalytic activity for carbamate synthesis. As for MDC synthesis, Zn4O(OAc)6 plays the important role. However, Zn(OAc)2 plays the leading role in MPC synthesis. The deactivation of Zn4O(OAc)6 was also investigated. Zn4O(OAc)6 was initially transformed into Zn5(OH)8(OAc)2·2H2O (LHZA) and then into ZnO. Graphical
      PubDate: 2017-06-01
      DOI: 10.1007/s10562-017-2055-z
      Issue No: Vol. 147, No. 6 (2017)
  • Sulfated Zirconia: An Efficient and Reusable Heterogeneous Catalyst in the
           Friedel–Crafts Acylation Reaction of 3-Methylindole
    • Authors: Darío A. Vargas; Leticia J. Méndez; Alicia S. Cánepa; Rodolfo D. Bravo
      Pages: 1496 - 1502
      Abstract: An efficient process for the Friedel–Crafts acylation of 3-methylindole with acid anhydrides in the presence of sulfated zirconia was developed. This catalyst shows excellent catalytic activity with good conversion and selectivity towards formation of the products of 2-acylation (3-methyl-1H-indol-2-yl)ketones. Other advantages related to this process are the simple work-up procedure and smaller production of chemical waste. The catalyst was easily recycled and reused with a minimal loss in activity through three reaction cycles. The catalyst was characterized by FT-IR spectroscopy, X-Ray diffraction and superficial acidity. Graphical
      PubDate: 2017-06-01
      DOI: 10.1007/s10562-017-2057-x
      Issue No: Vol. 147, No. 6 (2017)
  • Visible-Light-Induced AgI/Bi 7 O 9 I 3 Composites with Enhanced
           Photocatalytic Activity
    • Authors: Ikki Tateishi; Hideyuki Katsumata; Tohru Suzuki; Satoshi Kaneco
      Pages: 1503 - 1509
      Abstract: Highly efficient visible-light-driven AgI/Bi7O9I3 hybrid photocatalysts with different weight ratios of AgI were prepared via solvothermal-ion exchange method. Under visible light irradiation (>420 nm), the AgI/Bi7O9I3 photocatalysts displayed the higher photocatalytic activity than pure AgI and Bi7O9I3 for the degradation of bisphenol A (BPA). Among the hybrids, AgI/Bi7O9I3 with 33 wt% of AgI exhibited the highest photocatalytic activity for the degradation of BPA. X-ray photoelectron spectroscopy results revealed that the formation of metallic Ag0 from the hybrids was not observed during the photocatalytic reaction. Further, the photocatalytic activity of AgI/Bi7O9I3 maintained after five recycling runs. The quenching effects of different scavengers displayed that the reactive O2 ·− and h+ play the major role in the BPA degradation. The excellent photocatalytic activity of the AgI/Bi7O9I3 composites were closely related to the fast transfer and efficient separation of electron–hole pairs at the interfaces of the two semiconductors derived from the matching band positions between AgI and Bi7O9I3. Graphical
      PubDate: 2017-06-01
      DOI: 10.1007/s10562-017-2059-8
      Issue No: Vol. 147, No. 6 (2017)
  • Isomerization of Styrene Oxide to Phenyl Acetaldehyde over Different
           Modified Beta Zeolites
    • Authors: Xiong-Fei Zhang; Jianfeng Yao; Xiaoxia Yang
      Pages: 1523 - 1532
      Abstract: The catalytic performance of the isomerization of styrene oxide to phenyl acetaldehyde was investigated over different modified beta catalysts under gas-phase atmosphere free of solvents. The physicochemical properties were characterized by a combination of X-ray diffraction (XRD), N2 adsorption, Fourier transform infrared spectroscopy (FT-IR), Magic Angle Spinning Nuclear Magnetic Resonance (MAS-NMR), NH3-Temperature programmed desorption (NH3-TPD) and thermo gravimetric analysis (TGA), etc. Acid sites with stronger strength are responsible for the formation of condensation products and fast deactivation of catalysts. The obtained results also demonstrate that the introduction of boron atoms can create suitable acid strength and acid distribution without significantly destroying its microporous structures. Therefore, BAl-BEA sample is highly active and selective for the rearrangement of styrene oxide as well as very stable to deactivation. Graphical
      PubDate: 2017-06-01
      DOI: 10.1007/s10562-017-2004-x
      Issue No: Vol. 147, No. 6 (2017)
  • Theoretical Insights to Bulk Activity Towards Oxygen Evolution in
    • Authors: Andrew D. Doyle; Michal Bajdich; Aleksandra Vojvodic
      Pages: 1533 - 1539
      Abstract: The nature of the electrochemical water splitting activity of layered pure and Fe-doped NiOOH is investigated using density functional theory calculations. We find similar thermodynamics for the oxygen evolution reaction (OER) intermediates between the layers of oxyhydroxides, that is, in the bulk of the materials as on the (001) surface. The effect of interlayer spacing on adsorption energy is affected by both the crystal structure and the level of hydrogenation of the active sites. For the Fe-doped NiOOH, we observe general weakening of binding between the different OER intermediates and the catalyst material. The calculated OER activity depends both on doping and interlayer spacing, and our results are generally congruent with available experimental data. These results suggest that such interlayer “bulk” sites may contribute to measured OER activity for both the pure and Fe-doped NiOOH catalysts. Graphical
      PubDate: 2017-06-01
      DOI: 10.1007/s10562-017-2010-z
      Issue No: Vol. 147, No. 6 (2017)
  • Synthesis of Methyl Acrylate by Aldol Condensation of Methyl Acetate with
           Formaldehyde Over Al 2 O 3 -Supported Barium Catalyst
    • Authors: Qiang Bao; Tiantong Bu; Jianbiao Yan; Chunlei Zhang; Chunli Ning; Yi Zhang; Mengmeng Hao; Wenxiang Zhang; Zhenlu Wang
      Pages: 1540 - 1550
      Abstract: Vapor phase aldol condensation of methyl acetate with formaldehyde was first studied over Al2O3 with different calcination temperatures and Al2O3-supported barium with different amounts of barium catalysts. The catalysts were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, N2 adsorption–desorption, the pyridine absorption performed via Fourier transform infrared spectroscope, NH3 and CO2 temperature-programmed desorption. The results indicated that the calcination temperature affected the strength and the number of surface acid and base sites over the alumina catalysts. In addition, the moderate Lewis acid and weak base sites were critical to promote this aldol condensation reaction. Adding barium species, which could effectively modified the acid–base properties of Al2O3, clearly improved the catalytic activity and selectivity. The stability and regeneration of the optimum catalyst were also investigated and did not exhibit an obvious decrease in efficiency. Graphical Al2O3-supported barium catalyst was found to be an effective catalyst for vapor phase aldol condensation of methyl acetate with formaldehyde as a result of the appropriate intensity of acid and base.
      PubDate: 2017-06-01
      DOI: 10.1007/s10562-017-2014-8
      Issue No: Vol. 147, No. 6 (2017)
  • Efficient Catalytic System Involving Molybdenyl Acetylacetonate and
           Immobilized Tributylammonium Chloride for the Direct Synthesis of Cyclic
           Carbonates from Carbon Dioxide and Olefins
    • Authors: Agnieszka Siewniak; Katarzyna Jasiak-Jaroń; Łukasz Kotyrba; Stefan Baj
      Pages: 1567 - 1573
      Abstract: An effective direct method for preparing of cyclic carbonates from CO2 and olefins in the presence of tert-butyl hydroperoxide as an oxidant was provided. The first stage, the epoxidation of olefins, was carried out using MoO2(acac)2 as a catalyst (1h, 100 °C), and the second stage, the cycloaddition of CO2 to the resulting epoxide, was proceeded in the presence of immobilized tributylmethylammonium chloride on a polystyrene cross-linked with divinylbenzene, and an aqueous solution of ZnBr2 (100 °C, 0.9 MPa of CO2, 4 h). The proposed method allowed to obtain cyclic carbonates with high yields (50–77%) under mild conditions. Moreover, the immobilized catalyst could be reused at least five times without significant loss of its catalytic activity. Graphical
      PubDate: 2017-06-01
      DOI: 10.1007/s10562-017-2020-x
      Issue No: Vol. 147, No. 6 (2017)
  • Iron-Catalyzed C5 Halogenation of 8-Amidoquinolines Using Sodium Halides
           at Room Temperature
    • Authors: Yueqing Guan; Kai Wang; Jiabin Shen; Jun Xu; Chao Shen; Pengfei Zhang
      Pages: 1574 - 1580
      Abstract: An efficient method for the iron-catalyzed chlorination or bromination of quinoline at C5 positions using sodium halides at room temperature is described. The present process furnishes good yields and selectivities of the desired remote C–H activation products under mild reaction conditions. A plausible single electron transfer mechanism of the remote halogenation of quinolines is proposed on basis of the results of various control experiments. Graphical Text for Table of Contents: A simple and efficient process for the iron-catalyzed chlorination or bromination of quinoline at C5 positions using sodium halides at room temperature is described.
      PubDate: 2017-06-01
      DOI: 10.1007/s10562-017-2021-9
      Issue No: Vol. 147, No. 6 (2017)
  • Heterogeneous Photo-Fenton Degradation of Norfloxacin with Fe 3 O 4
           -Multiwalled Carbon Nanotubes in Aqueous Solution
    • Authors: Tian Shi; Jun Peng; Jianqiu Chen; Cheng Sun; Hua He
      Pages: 1598 - 1607
      Abstract: A catalyst, ferroferric oxide nanoparticles decorated with multiwalled carbon nanotubes was successfully fabricated, and applied for the degradation of norfloxacin in the presence of H2O2 and xenon light. The catalyst was characterized by different techniques i.e., X-ray diffraction, transmission electron microscope, and fourier transform infrared. The effects of initial pH, catalyst dosage, hydrogen peroxide concentration and iron leaching on the degradation of norfloxacin were studied. The multiwalled carbon nanotubes showed higher ability of degradation efficiency of norfloxacin than bare Fe3O4 nanoparticles in the batch degradation experiment. The results showed that the multiwalled carbon nanotubes catalyst demonstrated good performance in the degradation of norfloxacin with optimum operating conditions of multiwalled carbon nanotubes 1.2 g L−1, pH 3.0, H2O2 0.098 mol L−1 and the multiwalled carbon nanotubes catalyst still exhibited good chemical stability after five consecutive degradation cycles. Further, the catalyst showed stable catalytic activity, fairly good mechanic stability and convenient recycling. Negligible iron leaching demonstrated the reused multiwalled carbon nanotubes could withstood the oxidation. Graphical
      PubDate: 2017-06-01
      DOI: 10.1007/s10562-017-2026-4
      Issue No: Vol. 147, No. 6 (2017)
  • Photocatalytic Degradation of Hexaethylene Glycol
    • Authors: Drocilia Ednah Simangoye Ngobissi; Jihène Soufi; Laurent Vanoye; Dominique Richard
      Pages: 1608 - 1614
      Abstract: Polyethylene glycol (PEG) photodegradation was studied in water under UV irradiation in the presence of catalytic amount of TiO2 using hexaethylene glycol as a model compound. Full conversion was achieved in 7 h with an average quantum yield around 1%. Formic acid was found to be the main intermediate and was slower to oxidize into CO2 (traces remains after 24 h). The other intermediates [lower PEG, oxidized PEG (formates, aldehydes and acids, acetic acid)] of the photodegradation have also been identified and quantified. A mechanism based on previous literature but also taking into account these new observations is proposed. Graphical
      PubDate: 2017-06-01
      DOI: 10.1007/s10562-017-2029-1
      Issue No: Vol. 147, No. 6 (2017)
  • An Interfacially Active Pd/C Catalyst Enhanced Hydrogenation of Aromatic
           Compounds in Pickering Emulsion
    • Authors: Zhongyuan Han; Lianhua Peng; Qibaio Li; Yajuan Hao
      Pages: 1615 - 1621
      Abstract: Pickering-emulsion-based interfacial catalysis is an efficient platform for water–oil biphasic reactions. We here prepared an interfacially active Pd/C catalyst by loading Pd nanoparticles (ca. 5 nm) on carbon sphere support. Due to its amphiphilic properties (water contact angle of 93°), the Pd/C catalyst could easily assemble at toluene/water interface forming Pickering emulsions without further modification by surfactant. Moreover, we found that through tuning the volume ratio of toluene and water, the emulsion interface area could be well controlled, and a maximum interface area could be got at the ratio of 1/2. Encouragingly, the catalytic performance of our Pd/C catalyst in the Pickering emulsion system could be enhanced significantly compared with conventional oil–water biphasic system or organic one phase reaction system for the hydrogenation reaction of aromatic compouds. And our research demonstrated that the enhancement effects might be attributed to the enlarged interface area, which facilitates the mass transport significantly. Graphical
      PubDate: 2017-06-01
      DOI: 10.1007/s10562-017-2031-7
      Issue No: Vol. 147, No. 6 (2017)
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
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