Current Catalysis最新文献

{"title":"Tuning the Photocatalytic Performance of Plasmonic Nanocomposites (ZnO/Aux) Driven in Visible Light","authors":"Aneeya K. Samantara, D. Dash, Diptimoyee Bhuyan, Namita Dalai, Bijayalaxmi Jena","doi":"10.2174/2211544708666190124114519","DOIUrl":"https://doi.org/10.2174/2211544708666190124114519","url":null,"abstract":"\u0000\u0000In this article, we explored the possibility of controlling the reactivity of ZnO nanostructures\u0000by modifying its surface with gold nanoparticles (Au NPs). By varying the concentration of Au with\u0000different wt% (x = 0.01, 0.05, 0.08, 1 and 2), we have synthesized a series of (ZnO/Aux) nanocomposites\u0000(NCs). A thorough investigation of the photocatalytic performance of different wt% of Au NPs on\u0000ZnO nanosurface has been carried out. It was observed that ZnO/Au0.08 nanocomposite showed the highest\u0000photocatalytic activity among all concentrations of Au on the ZnO surface, which degrades the dye\u0000concentration within 2 minutes of visible light exposure. It was further revealed that with an increase in\u0000the size of plasmonic nanoparticles beyond 0.08%, the accessible surface area of the Au nanoparticle decreases.\u0000The photon absorption capacity of Au nanoparticle decreases beyond 0.08% resulting in a decrease\u0000in electron transfer rate from Au to ZnO and a decrease of photocatalytic activity.\u0000\u0000\u0000\u0000Due to the industrialization process, most of the toxic materials go into the water bodies,\u0000affecting the water and our ecological system. The conventional techniques to remove dyes are expensive\u0000and inefficient. Recently, heterogeneous semiconductor materials like TiO2 and ZnO have been\u0000regarded as potential candidates for the removal of dye from the water system.\u0000\u0000\u0000\u0000To investigate the photocatalytic performance of different wt% of Au NPs on ZnO nanosurface\u0000and the effect of the size of Au NPs for photocatalytic performance in the degradation process.\u0000\u0000\u0000\u0000A facile microwave method has been adopted for the synthesis of ZnO nanostructure followed\u0000by a reduction of gold salt in the presence of ZnO nanostructure to form the composite.\u0000\u0000\u0000\u0000ZnO/Au0.08 nanocomposite showed the highest photocatalytic activity which degrades the dye\u0000concentration within 2 minutes of visible light exposure. The schematic mechanism of electron transfer\u0000rate was discussed.\u0000\u0000\u0000\u0000Raspberry shaped ZnO nanoparticles modified with different percentages of Au NPs\u0000showed good photocatalytic behavior in the degradation of dye molecules. The synergetic effect of\u0000unique morphology of ZnO and well anchored Au nanostructures plays a crucial role.\u0000","PeriodicalId":10862,"journal":{"name":"Current Catalysis","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75227508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MgRuAl-layered Double Hydroxides (LDH): An Efficient Multifunctional Catalyst for Aldol Condensation and Transfer Hydrogenation Reactions","authors":"Hemaprobha Saikia and Sanjay Basumatary","doi":"10.2174/2211550108666190418125857","DOIUrl":"https://doi.org/10.2174/2211550108666190418125857","url":null,"abstract":"\u0000\u0000 Layered double hydroxides (LDH) are drawing much attention as solid catalysts\u0000in recent years and have applications in various organic transformations as they possess a variety\u0000of basic sites which could be obtained by exchange of metal ions or by intercalation of suitable anions\u0000into their interlayer space. Ru based complexes have widespread catalytic applications in many organic\u0000reactions. Herein, novel ruthenium containing ternary LDH has been synthesized and used as a multifunctional\u0000catalyst for Aldol condensation and transfer hydrogenation reactions.\u0000\u0000\u0000\u0000Ternary LDH multifunctional catalyst containing Mg, Ru and Al was prepared by coprecipitation\u0000and hydrothermal treatment. The catalyst was characterized by elemental analysis, Powder\u0000XRD, FT-IR, BET, TGA, DRS, SEM, EDX, XPS and TEM. The products of the reactions were\u0000characterized by 1H NMR and GC-MS.\u0000\u0000\u0000\u0000The analysis of catalyst revealed incorporation of Ru in the brucite layers of the LDH and\u0000showed the mosaic single crystal with BET surface area of 84.25 m2 g-1. This catalyst yielded 85–98%\u0000products for Aldol condensation reactions within 4 h reaction time, and 82–98% products for transfer\u0000hydrogenation reactions within 16 h reaction time.\u0000\u0000\u0000\u0000The resultant MgRuAl-LDH with acid and base sites was found to be highly active and\u0000selective for one-step synthesis of nitrile compounds. The catalyst works more efficiently for Aldol\u0000condensation reactions in shorter reaction times compared to transfer hydrogenation reactions.\u0000","PeriodicalId":10862,"journal":{"name":"Current Catalysis","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90883936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Meet Our Editorial Board Member","authors":"Jerry J. Wu","doi":"10.2174/221154470703181129112804","DOIUrl":"https://doi.org/10.2174/221154470703181129112804","url":null,"abstract":"","PeriodicalId":10862,"journal":{"name":"Current Catalysis","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86499764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fly Ash Catalyzed Microwave Assisted Multicomponent Synthesis of Trisubstituted Imidazole Derivatives","authors":"S. S. Chine, C. S. Patil, V. Gade","doi":"10.2174/2211544707666180918153941","DOIUrl":"https://doi.org/10.2174/2211544707666180918153941","url":null,"abstract":"","PeriodicalId":10862,"journal":{"name":"Current Catalysis","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78049043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magnetically Recoverable Nano Sulfated Titania Catalysed One Pot Synthesis of 4(3H)-quinazolinone Derivatives","authors":"S. S. Sabale, M. Degani","doi":"10.2174/2211544707666180702125931","DOIUrl":"https://doi.org/10.2174/2211544707666180702125931","url":null,"abstract":"","PeriodicalId":10862,"journal":{"name":"Current Catalysis","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73893759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Au Nanoparticles Catalyzed Chemoselective Aldehyde Oxidation/Amine Coupling to Imines","authors":"Rodrigo M. S. Justo, Gustavo F. S. Andrade, G. Amarante","doi":"10.2174/2211544707666181023120026","DOIUrl":"https://doi.org/10.2174/2211544707666181023120026","url":null,"abstract":"","PeriodicalId":10862,"journal":{"name":"Current Catalysis","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88059150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Insight into Acetylation of Anisyl Alcohol Using 20% (w/w) Cs2.5H0.5 PW12O40 Supported on Mesocelllular Foam (MCF) Silica","authors":"Kalpesh Bhadra and Ganapati Yadav","doi":"10.2174/2211544707666180629093850","DOIUrl":"https://doi.org/10.2174/2211544707666180629093850","url":null,"abstract":"","PeriodicalId":10862,"journal":{"name":"Current Catalysis","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73023271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of 2,3-Dihydroquinazolin-4(1H)-ones Using Carboxylic Acids as Catalyst","authors":"E. Mir, Ebrahim Mollashahi, G. Marandi","doi":"10.2174/2211544707666180924125826","DOIUrl":"https://doi.org/10.2174/2211544707666180924125826","url":null,"abstract":"","PeriodicalId":10862,"journal":{"name":"Current Catalysis","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74080777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Effect of Adsorbed Hydroxyl Content on the Surface of TiO2 Nanorod Array and its Photocatalytic Degradation Study","authors":"H. Suryawanshi, S. G. Bachhav, D. R. Patil","doi":"10.2174/2211544707666181107111930","DOIUrl":"https://doi.org/10.2174/2211544707666181107111930","url":null,"abstract":"","PeriodicalId":10862,"journal":{"name":"Current Catalysis","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79946513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Catalytic Activity of Co3O4 Supported on Activated Carbon for Alcohols Oxidation","authors":"Misael Cordoba, A. Ramírez, C. Miranda, Cecilia R. Lederhos, Alba N. Ardila, Y. Pouilloux","doi":"10.2174/2211544707666180831094741","DOIUrl":"https://doi.org/10.2174/2211544707666180831094741","url":null,"abstract":"Fil: Cordoba Arroyo, Misael. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Santa Fe. Instituto de Investigaciones en Catalisis y Petroquimica \"Ing. Jose Miguel Parera\". Universidad Nacional del Litoral. Instituto de Investigaciones en Catalisis y Petroquimica \"Ing. Jose Miguel Parera\"; Argentina. Universidad del Cauca; Colombia","PeriodicalId":10862,"journal":{"name":"Current Catalysis","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87288842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}