Discrimination effects in zeolite modified metal oxide semiconductor gas sensors

R. Binions, A. Afonja, S. Dungey, D. Lewis, I. Parkin, David E. Williams
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引用次数: 38

Abstract

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) 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 behaviour is elucidated through computer modelling of diffusion and reaction processes occurring in the zeolite transformation layer and sensor element. Our analysis suggests that the discriminating behaviour is the result of a size and shape selective catalysis.
沸石改性金属氧化物半导体气体传感器的识别效应
利用沸石提高了固态金属氧化物半导体气体传感器的响应能力和识别能力。以各种沸石为覆盖层,采用丝网印刷法制备了氧化铬钛(CTO)厚膜传感器。对传感器的气体响应进行了两种相似气体的测试;乙醇和异丙醇。改进后的传感器能有效地区分这两种气体。通过对沸石转化层和传感器元件中发生的扩散和反应过程的计算机模拟,阐明了对这种区分行为的理解。我们的分析表明,这种区分行为是大小和形状选择性催化的结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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