Discrimination Effects in Zeolite Modified Metal Oxide Semiconductor Gas Sensors

被引：29

作者：

Binions, Russell ^{[1
]}

Afonja, Ayo ^{[1
]}

Dungey, Sheena ^{[1
]}

Lewis, Dewi W. ^{[1
]}

Parkin, Ivan P. ^{[1
]}

Williams, David E. ^{[2
]}

机构：

[1] UCL, Dept Chem, London WC1H 0AJ, England

[2] Univ Auckland, Dept Chem, MacDiarmid Inst Adv Mat & Nanotechnol, Auckland, New Zealand

来源：

IEEE SENSORS JOURNAL | 2011年 / 11卷 / 05期

基金：

英国工程与自然科学研究理事会;

关键词：

Chemical sensors; gas detectors; sensors; sensor arrays; thick-film sensors; SENSITIVE RESISTORS; TEMPERATURE;

D O I：

10.1109/JSEN.2010.2084079

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The use of zeolites to enhance the response and discriminating power of solid state metal oxide semiconductor gas sensors is demonstrated. Thick film sensors were prepared by screen printing layers of chromium titanium oxide (CTO) or tungsten trioxide with various zeolites as over-layers. The sensors gas response was tested against two similar gases; ethanol and isopropyl alcohol. The modified sensors effectively discriminated between the two gases. An understanding of this discriminating behavior is elucidated through computer modeling of diffusion and reaction processes occurring in the zeolite transformation layer and sensor element. Our analysis suggests that the discrimination is the result of the size and shape selective behavior.

引用

页码：1145 / 1151

页数：7

共 14 条

[1] Theoretical description of the interactions between a mixture of vapors and a set of chemical sensors by variable temperature [J].