• 文献标题:   Facile Solvothermal Synthesis and Gas Sensitivity of Graphene/WO3 Nanocomposites
  • 文献类型:   Article
  • 作  者:   GUI YH, YUAN JH, WANG WM, ZHAO JB, TIAN JF, XIE B
  • 作者关键词:   wo3, graphene/wo3, solvothermal, gas sensor
  • 出版物名称:   MATERIALS
  • ISSN:  
  • 通讯作者地址:   Zhengzhou Univ Light Ind
  • 被引频次:   15
  • DOI:   10.3390/ma7064587
  • 出版年:   2014

▎ 摘  要

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.