H2S sensing properties of WO3 based gas sensor

被引：28

作者：

Urasinska-Wojcik, B. ^{[1
]}

Vincent, T. A. ^{[1
]}

Gardner, J. W. ^{[1
]}

机构：

[1] Univ Warwick, Sch Engn, Coventry, W Midlands, England

来源：

PROCEEDINGS OF THE 30TH ANNIVERSARY EUROSENSORS CONFERENCE - EUROSENSORS 2016 | 2016年 / 168卷

关键词：

gas sensor; H2S detection; metal oxide; sensing layer;

D O I：

10.1016/j.proeng.2016.11.181

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Semiconductor gas sensors based upon n-type WO3 nanoparticle powder were fabricated and their response from 100 ppb to ppm levels of H2S in air has been investigated. In this study, a low power MEMS based micro-hotplate was employed as the substrate and operated at a constant temperature of 350 degrees C. Experimental data demonstrate repeatable results across the range of concentrations. The devices have good response and recovery times and importantly excellent stability. Cross-sensitivities towards other reducing gases/VOCs showed that the WO3-based sensors are less sensitive to CO, acetone, H-2 and CH4 even at much higher ppm levels. (C) 2016 Published by Elsevier Ltd.

引用

页码：255 / 258

页数：4

共 3 条

[1] Hydrogen sulfide: UK occupational exposure limits [J].