Open AccessAg‐deposited carbon‐coated Fe 3 O 4 magnetic microparticles as highly efficient and recyclable catalysts
Author(s) -
Ye YingJie,
Li Yue,
Gao FengXian,
Zhang YongXing
Publication year - 2019
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2019.0261
Subject(s) - catalysis , materials science , carbon fibers , chemical engineering , nanoparticle , magnetic nanoparticles , magnet , 4 nitrophenol , nanotechnology , chemistry , organic chemistry , composite material , physics , quantum mechanics , composite number , engineering
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.