Au-doped WO3-based sensor for NO2 detection at low operating temperature

被引：254

作者：

Xia, Huijuan ^{[1
]}

Wang, Yan ^{[1
]}

Kong, Fanhong ^{[1
]}

Wang, Shurong ^{[1
]}

Zhu, Baolin ^{[1
]}

Guo, Xianzhi ^{[1
]}

Zhang, Jun ^{[1
]}

Wang, Yanmei ^{[1
]}

Wu, Shihua ^{[1
]}

机构：

[1] Nankai Univ, Dept Chem, Tianjin 300071, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2008年 / 134卷 / 01期

关键词：

Au-doped WO3; Gas sensor; NO2; Structural characterization; Low temperature;

D O I：

10.1016/j.snb.2008.04.018

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Pure and Au-doped WO3 powders for NO2 gas detection were prepared by a colloidal chemical method, and characterized via X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The NO2 sensing properties of the sensors based on pure and Au-doped WO3 powders were investigated by HW-30A gas sensing measurement. The results showed that the gas sensing properties of the doped WO3 sensors were superior to those of the undoped one. Especially, the 1.0 wt% Au-doped WO3 sensor possessed larger response, better selectivity, faster response/recovery and better longer term stability to NO2 than the others at relatively low operating temperature (150 degrees C). (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：133 / 139

页数：7

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