Facile Solvothermal Synthesis and Gas Sensitivity of Graphene/WO3 Nanocomposites

被引：22

作者：

Gui, Yanghai ^{[1
]}

Yuan, Junhua ^{[2
]}

Wang, Weiming ^{[1
]}

Zhao, Jianbo ^{[1
]}

Tian, Junfeng ^{[1
]}

Xie, Bing ^{[1
]}

机构：

[1] Zhengzhou Univ Light Ind, Dept Mat & Chem Engn, Zhengzhou 450002, Henan, Peoples R China

[2] Zhejiang Normal Univ, Coll Life Sci & Chem, Jinhua 321004, Zhejiang, Peoples R China

来源：

MATERIALS | 2014年 / 7卷 / 06期

基金：

中国国家自然科学基金;

关键词：

WO3; graphene/WO3; solvothermal; gas sensor; SENSING PROPERTIES; WO3; PERFORMANCE; SENSORS;

D O I：

10.3390/ma7064587

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

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.

引用

页码：4587 / 4600

页数：14

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