Ag-deposited carbon-coated Fe 3 O 4 magnetic microparticles as highly efficient and recyclable catalysts

Micro & nano letters

article

YingJie Ye¹  Yue Li¹  FengXian Gao¹  YongXing Zhang² 

[1] School of Materials and Chemical Engineering, Henan University of Engineering;School of Physics and Electronic Information, Huaibei Normal University

关键词: nanoparticles;    reduction (chemical);    carbon;    silver;    recycling;    catalysis;    magnetic particles;    catalysts;    nanofabrication;    nanomagnetics;    particle size;    organic compounds;    iron compounds;    reaction rate constants;    external magnet;    highly efficient catalysts;    recyclable catalysts;    catalytic efficiency;    model reaction;    pseudofirst-order reaction;    high-density AgNPs;    in situ growth process;    Ag-deposited carbon-coated magnetic microparticles;    magnetic carbon-coated microparticles;    4-nitrophenol;    reduction reaction kinetic data;    Ag-C-Fe3O4;    NaBH4;   

DOI  :  10.1049/mnl.2019.0261

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

In this work, Ag nanoparticles (AgNPs) with average sizes of 20 nm were well-dispersed on the surfaces of magnetic carbon-coated Fe 3 O 4 (Fe 3 O 4 @C) microparticles through a simple in situ growth process. The catalytic efficiency of the as-prepared AgNPs-decorated Fe 3 O 4 @C particles was evaluated using a model reaction based on the reduction of 4-nitrophenol (4-NP) by an excess of NaBH 4 . The kinetic data of the reduction reaction could be explained by the assumption of a pseudo-first-order reaction with regard to 4-NP. Also the particles are catalytically more active due to their extremely high-density AgNPs immobilised on the surfaces of Fe 3 O 4 @C particles. Significantly, the Fe 3 O 4 @C@Ag catalysts can be easily separated from the reaction media by applying an external magnet, and can be reused for several cycles.

【 授权许可】

CC BY|CC BY-ND|CC BY-NC|CC BY-NC-ND