Direct observation of enhanced plasmon-driven catalytic reaction activity of Au nanoparticles supported on reduced graphene oxides by SERS

Graphene-based nanocomposites have recently attracted tremendous research interest in the field of catalysis due to their unique optical and electronic properties. However, direct observation of enhanced plasmon-driven catalytic activity of Au nanoparticles (NPs) supported on reduced graphene oxides...

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Published in:Physical chemistry chemical physics : PCCP 2015-04, Vol.17 (15), p.10176-10181
Main Authors: Liang, Xiu, You, Tingting, Liu, Dapeng, Lang, Xiufeng, Tan, Enzhong, Shi, Jihua, Yin, Penggang, Guo, Lin
Format: Article
Language:English
Subjects:
Catalysis
Catalysts
Gold
Gold - chemistry
Graphene
Graphite - chemistry
Microscopy, Electron, Transmission
Nanocomposites
Nanoparticles
Nanoparticles - chemistry
Oxidation-Reduction
Oxides
Oxides - chemistry
Raman scattering
Spectroscopy, Fourier Transform Infrared
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Summary:Graphene-based nanocomposites have recently attracted tremendous research interest in the field of catalysis due to their unique optical and electronic properties. However, direct observation of enhanced plasmon-driven catalytic activity of Au nanoparticles (NPs) supported on reduced graphene oxides (Au/rGO) has rarely been reported. Herein, based on the reduction from 4-nitrobenzenethiol (4-NBT) to p,p'-dimercaptoazobenzene (DMAB), the catalytic property of Au/rGO nanocomposites was investigated and compared with corresponding Au NP samples with similar size distribution. Our results show that Au/rGO nanocomposites could serve as a good catalytic and analytic platform for plasmon-driven chemical reactions. In addition, systematic comparisons were conducted during power- and time-dependent surface-enhanced Raman scattering (SERS) experiments, which exhibited a lower power threshold and higher catalytic efficiency for Au/rGO as compared to Au NPs toward the reaction.
ISSN:1463-9076
1463-9084
DOI:10.1039/c5cp00908a