Issue 17, 2012
From the journal:

Journal of Materials Chemistry

Au/graphene hydrogel: synthesis, characterization and its use for catalytic reduction of 4-nitrophenol†

Jing Li,ab   Chun-yan Liu*a  and  Yun Liua  

* Corresponding authors

a Key Laboratory of Photochemical Conversion and Optoelectronic Materials of Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Zhongguancun, Beijing 100190, PR China

b Graduate School of the Chinese Academy of Sciences, Beijing 100806, PR China

Abstract

A cylindrical piece of Au/graphene hydrogel, 1.08 cm in diameter and 1.28 cm in height, has been synthesized through the self-assembly of Au/graphene sheets under hydrothermal conditions for the first time. The hydrogel, containing 2.26 wt% Au, 6.94 wt% graphene, and 90.8 wt% water, exhibited excellent catalytic performance towards the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP), which is about 90 times larger than previously reported values for spongy Au nanoparticles and 14 times more than the highest value among the polymer supported Au nanoparticle catalysts. The high catalytic activity arises from the synergistic effect of graphene: (1) the high adsorption ability of graphene towards 4-NP, providing a high concentration of 4-NP near to the Au nanoparticles on graphene; and (2) electron transfer from graphene to Au nanoparticles, facilitating the uptake of electrons by 4-NP molecules.

Graphical abstract: Au/graphene hydrogel: synthesis, characterization and its use for catalytic reduction of 4-nitrophenol

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Article information

DOI
https://doi.org/10.1039/C2JM16386A
Article type
Paper
Submitted
06 Dec 2011
Accepted
15 Feb 2012
First published
19 Mar 2012

J. Mater. Chem., 2012,22, 8426-8430

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Au/graphene hydrogel: synthesis, characterization and its use for catalytic reduction of 4-nitrophenol

J. Li, C. Liu and Y. Liu, J. Mater. Chem., 2012, 22, 8426 DOI: 10.1039/C2JM16386A

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