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

Jinwen Qin; Minhua Cao; Na Li; Changwen Hu

doi:10.1039/c1jm12692j

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

Jinwen Qin, Minhua Cao^*, Na Li, Changwen Hu

^*Corresponding author for this work

School of Chemistry and Chemical Engineering

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

171 Citations (Scopus)

Abstract

WO₃/graphene (GN) nanocomposites have been successfully synthesized using a facile three-step synthesis. First, an SrWO ₄/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/GN via 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.

Original language	English
Pages (from-to)	17167-17174
Number of pages	8
Journal	Journal of Materials Chemistry
Volume	21
Issue number	43
DOIs	https://doi.org/10.1039/c1jm12692j
Publication status	Published - 21 Nov 2011

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abstract = "WO3/graphene (GN) nanocomposites have been successfully synthesized using a facile three-step synthesis. First, an SrWO 4/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/GN via 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.",

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AU - Qin, Jinwen

AU - Cao, Minhua

AU - Li, Na

AU - Hu, Changwen

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N2 - WO3/graphene (GN) nanocomposites have been successfully synthesized using a facile three-step synthesis. First, an SrWO 4/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/GN via 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.

AB - WO3/graphene (GN) nanocomposites have been successfully synthesized using a facile three-step synthesis. First, an SrWO 4/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/GN via 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.

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

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