Discrimination Effects in Zeolite Modified Metal Oxide Semiconductor Gas Sensors
Discrimination Effects in Zeolite Modified Metal Oxide Semiconductor Gas Sensors
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DOI：
10.1109/jsen.2010.2084079
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发表时间：
2011-05-01
影响因子：
4.3
通讯作者：
Williams, David E.
中科院分区：
文献类型：
--
作者：
Binions, Russell;Afonja, Ayo;Williams, David E.
使用沸石，以提高固态金属氧化物半导体气体传感器的响应和鉴别能力的证明。厚膜传感器的制备通过丝网印刷层的铬钛氧化物（CTO）或三氧化钨与各种沸石作为覆盖层。传感器的气体响应针对两种类似的气体进行了测试;乙醇和异丙醇。改进后的传感器有效地区分了这两种气体。通过计算机模拟的扩散和反应过程中发生的沸石转化层和传感器元件的这种歧视行为的理解阐明。我们的分析表明，歧视是大小和形状选择行为的结果。
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.