Issue 43, 2011
From the journal:

Journal of Materials Chemistry

Graphene-wrapped WO3nanoparticles with improved performances in electrical conductivity and gas sensing properties†

Jinwen Qin,a   Minhua Cao,*a   Na Lia  and  Changwen Hu*a  

* Corresponding authors

a Key Laboratory of Cluster Science, Ministry of Education of China, Department of Chemistry, Beijing Institute of Technology, Beijing, P. R. China
E-mail: caomh@bit.edu.cn, cwhu@bit.edu.cn
Fax: +86-10-68912631
Tel: +86-10-68918468

Abstract

WO3/graphene (GN) nanocomposites have been successfully synthesized using a facile three-step synthesis. First, an SrWO4/graphene oxide (GO) precursor was synthesized by homogeneous precipitation; second, the SrWO4/GO precursor was transformed into WO3/GO hybrids by acidification; and third, the WO3/GO hybrids were reduced to WO3/GNvia UV-assisted photoreduction in water instead of general alcoholic solvent at room temperature. The resulting WO3 nanoparticles anchored on graphene sheets as spacers to keep the neighboring sheets separated are approximately quadrangular with a side length of 50–200 nm. Compared with WO3/GO hybrids, WO3/GN nanocomposites show an enhanced electrical conductivity, which results in an improved gas sensing towards alcohol. This work provides a new insight into the fabrication of tungstate–graphene composites and facilitates their application in future.

Graphical abstract: Graphene-wrapped WO3 nanoparticles with improved performances in electrical conductivity and gas sensing properties

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Article information

DOI
https://doi.org/10.1039/C1JM12692J
Article type
Paper
Submitted
12 Jun 2011
Accepted
12 Aug 2011
First published
10 Oct 2011

J. Mater. Chem., 2011,21, 17167-17174

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Graphene-wrapped WO3 nanoparticles with improved performances in electrical conductivity and gas sensing properties

J. Qin, M. Cao, N. Li and C. Hu, J. Mater. Chem., 2011, 21, 17167 DOI: 10.1039/C1JM12692J

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