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Materials 2014, 7(6), 4587-4600; https://doi.org/10.3390/ma7064587

Facile Solvothermal Synthesis and Gas Sensitivity of Graphene/WO3 Nanocomposites

1
Department of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, Henan, China
2
College of Life Sciences and Chemistry, Zhejiang Normal University, Jinhua 321004, Zhejiang, China
*
Author to whom correspondence should be addressed.
Received: 1 May 2014 / Revised: 9 June 2014 / Accepted: 9 June 2014 / Published: 17 June 2014
(This article belongs to the Section Advanced Composites)
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Abstract

Graphene has attracted enormous attention owing to its extraordinary properties, while graphene-based nanocomposites hold promise for many applications. In this paper, we present a two-step exploitation method for preparation of graphene oxides and a facile solvothermal route for preparation of few-layer graphene nanosheets and graphene/WO3 nanocomposites in an ethanol-distilled water medium. The as-synthesized samples were characterized by using field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HRTEM), ultraviolet-visible (UV-vis) spectroscopy, Raman spectroscopy, X-ray diffraction (XRD), thermogravimetric-differential thermal analysis (TG-DTA) and gas-sensing test. The resistivity of the thick-film gas sensors based on sandwich-like graphene/WO3 nanocomposites can be controlled by varying the amount of graphene in the composites. Graphene/WO3 nanocomposites with graphene content higher than 1% show fast response, high selectivity and fine sensitivity to NOx. View Full-Text
Keywords: WO3; graphene/WO3; solvothermal; gas sensor WO3; graphene/WO3; solvothermal; gas sensor
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Gui, Y.; Yuan, J.; Wang, W.; Zhao, J.; Tian, J.; Xie, B. Facile Solvothermal Synthesis and Gas Sensitivity of Graphene/WO3 Nanocomposites. Materials 2014, 7, 4587-4600.

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