摘要
以无机盐SnCl2·2H2O为主体原料，以（C4H9O）4Ti为掺杂剂，无水乙醇为溶剂，采用溶胶-凝胶（Sol-Gel）工艺制备了TiO2掺杂的SnO2薄膜。采用差热-失重（DTA－TG）及X射线衍射（XRD）等分析手段研究了1mol％TiO2－SnO2薄膜的热分解晶化过程及物相组成。发现1mol％TiO2－SnO2薄膜在常温下对NOx气体具有较好的气敏性能，并可以在不同的工作温度下检测低浓度的NOx及H2S气体。本文还讨论了1mol％TiO2－SnO2薄膜对NOx及H2S的气敏机理。
The paper is a report of the experiment on TiO2-SnO2 thin film prepared bythe Sol-Gel technique with non-alkoxide SnCl2·2H2O as main precursor, Ti(OC4H9)4 asdopant, ethanol as solvent. The thermal decomposition and crystallization processes of 1％molTiO2-SnO2 thin film have been studied with DTA-TG and XRD analysis. It is found that1％mol TiO2-SnO2 thin film prepared by this method has good sensitivity to NO2 and H2S atroom temperature and is able to detect the low concentration of NO2 and H2S at differentoptimum operating temperatures. The gas sensing mechanism of TiO2-SnO2 thin film to NO2and H2S is also discussed in the paper.
出处
《襄樊学院学报》
1999年第2期8-13,共6页
Journal of Xiangfan University
基金
国家自然科学基金
湖北省教委基金!97A085
