Magnetically separable CuFe2O4/reduced graphene oxide nanocomposites: as a highly active catalyst for solvent free oxidative coupling of amines to imines
作者： Ritu Dhanda , Mazaahir Kidwai
DOI: 10.1039/C6RA08868F
关键词:
摘要: In this report, a very simple and straightforward one step coprecipitation method was used for decorating CuFe2O4 nanoparticles (NPs) over graphene sheets. The as synthesized CuFe2O4/RGO nanocomposites (CFRNCs) were fully characterized by XRD, TEM, HRTEM, XPS, FTIR, Raman, ICP-AES SEM-EDS analysis which shows well controlled small sized (∼7 nm from Scherrer formula) NPs with dense compact loading RGO magnetic study reveals the superparamagnetic behavior of ferrite provides an extra benefit in catalytic recyclability. CFRNCs found to be highly active aerobic oxidative coupling amines desired imines achieving excellent yields (88–95%) under mild reaction conditions. Moreover role Cu, Fe species their interaction sheets studied separately synthesizing CuO/RGO, Fe2O3/RGO, bare samples, then mechanism proposed based upon various results. recycled up 4th cycle similar conditions efficient without any accountable loss activity stability. This outstanding can attributed synergistic between Cu/Fe species, high surface area due presence surfactant free led use present nanocatalyst many more industrially important applications.
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sci-hub.se 参考文章(35)
Xianjun Zhu, Yanwu Zhu, Shanthi Murali, Meryl D. Stoller, Rodney S. Ruoff, Nanostructured reduced graphene oxide/Fe2O3 composite as a high-performance anode material for lithium ion batteries. ACS Nano. ,vol. 5, pp. 3333- 3338 ,(2011) , 10.1021/NN200493R
Huihui Liu, Gaik-Khuan Chuah, Stephan Jaenicke, Self-coupling of benzylamines over a highly active and selective supported copper catalyst to produce N-substituted amines by the borrowing hydrogen method Journal of Catalysis. ,vol. 329, pp. 262- 268 ,(2015) , 10.1016/J.JCAT.2015.05.029
A Suresh Kumar, M Amarnath Reddy, M Knorn, O Reiser, B Sreedhar, None, Magnetically Recoverable CuFe2O4 Nanoparticles: Catalyzed Synthesis of Aryl Azides and 1,4-Diaryl-1,2,3-triazoles from Boronic Acids in Water European Journal of Organic Chemistry. ,vol. 2013, pp. 4674- 4680 ,(2013) , 10.1002/EJOC.201300343
Yantao Zhang, Linjuan Pei, Zhanfeng Zheng, Yong Yuan, Tengfeng Xie, Juan Yang, Shuai Chen, Junwen Wang, Eric R. Waclawik, Huaiyong Zhu, Heterojunctions between amorphous and crystalline niobium oxide with enhanced photoactivity for selective aerobic oxidation of benzylamine to imine under visible light Journal of Materials Chemistry. ,vol. 3, pp. 18045- 18052 ,(2015) , 10.1039/C5TA03214H
Ritu Dhanda, Mazaahir Kidwai, Reduced graphene oxide supported AgxNi100−x alloy nanoparticles: a highly active and reusable catalyst for the reduction of nitroarenes Journal of Materials Chemistry. ,vol. 3, pp. 19563- 19574 ,(2015) , 10.1039/C5TA03779D
Haiyan Zhang, Shutao Gao, Ningzhao Shang, Chun Wang, Zhi Wang, Copper ferrite–graphene hybrid: a highly efficient magnetic catalyst for chemoselective reduction of nitroarenes RSC Advances. ,vol. 4, pp. 31328- 31332 ,(2014) , 10.1039/C4RA05059B
Hao Zhang, Xiaojun Lv, Yueming Li, Ying Wang, Jinghong Li, P25-Graphene Composite as a High Performance Photocatalyst ACS Nano. ,vol. 4, pp. 380- 386 ,(2010) , 10.1021/NN901221K
Jason C Reed, Hai Zhu, Alexander Y Zhu, Chen Li, Ertugrul Cubukcu, None, Graphene-enabled silver nanoantenna sensors. Nano Letters. ,vol. 12, pp. 4090- 4094 ,(2012) , 10.1021/NL301555T
Wang Zhang, Bo Quan, Chaedong Lee, Seung-Keun Park, Xinghe Li, Eunjin Choi, Guowang Diao, Yuanzhe Piao, One-Step Facile Solvothermal Synthesis of Copper Ferrite–Graphene Composite as a High-Performance Supercapacitor Material ACS Applied Materials & Interfaces. ,vol. 7, pp. 2404- 2414 ,(2015) , 10.1021/AM507014W
A. K. Geim, K. S. Novoselov, The rise of graphene Nature Materials. ,vol. 6, pp. 183- 191 ,(2007) , 10.1038/NMAT1849