Issue 22, 2013

In situ preparation, characterization, magnetic and catalytic studies of surfactant free RGO/FexCo100−x nanocomposites

Abstract

A novel, “wet” and “clean” methodology was developed to prepare FexCo100−x nanoparticles on reduced graphene oxide (RGO) surfaces in an aqueous solution through a coreduction process. Without any surface treatment, FexCo100−x nanoparticles can in situ grow on the RGO sheets. It was found that RGO nanosheets can effectively prevent the aggregation of FexCo100−x nanoparticles. The results reveal that the RGO/FexCo100−x nanocomposites have ferromagnetic characteristics and show composition dependent magnetic properties. The effectiveness of the as-prepared RGO/FexCo100−x nanocomposites as solid phase heterogeneous catalysts have been evaluated, for the first time, on the well-known 4-nitrophenol (4-NP) reduction to 4-aminophenol (4-AP) in the presence of excess sodium borohydride. The effect of initial 4-NP concentration, and catalyst loading dose were evaluated. The catalyst efficiency was examined on the basis of turnover frequency (TOF) and recyclability. The RGO/Fe25Co75 nanocomposites exhibit good catalytic activity toward 4-nitrophenol (4-NP) reduction and the graphene oxide (GO) supports also enhance the catalytic activity via a synergistic effect. The as-prepared RGO/FexCo100−x nanocomposite catalysts are very efficient, stable, easy to prepare, eco-friendly, cost-effective, and have potential industrial applications.

Graphical abstract: In situ preparation, characterization, magnetic and catalytic studies of surfactant free RGO/FexCo100−x nanocomposites

Supplementary files

Article information

Article type
Paper
Submitted
15 Nov 2012
Accepted
14 Jan 2013
First published
14 Jan 2013

Dalton Trans., 2013,42, 7936-7942

In situ preparation, characterization, magnetic and catalytic studies of surfactant free RGO/FexCo100−x nanocomposites

F. Chen, P. Xi, C. Ma, C. Shao, J. Wang, S. Wang, G. Liu and Z. Zeng, Dalton Trans., 2013, 42, 7936 DOI: 10.1039/C3DT32730B

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