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Preparation and gas sensitive Properties of Nanometer-Sized SnO_(2)

Advances in Manufacturing 1998年第1期 75-79页

作者： Pan Qingyi Dong Xiaowen Xu Jiaqiang Zhang Jianping Shi Liyi School of Chemicstry and Chemical Engineering Shanghai University Zhengzhou Institute of Light Industry

Nanometer sized SnO 2 particles were prepared by a sol gel method using inorganic salt as a precursor material. Its crystallization was investigated by means of TG DTA,IR absorption spectra, X ray diffractometry and TEM as well as its resistivity change and the gas sensitivity varied with temperature were measured in various reducing gas. The results indicate that well crystallized nano sized SnO 2 with size around 15nm can be obtained at annealing temperature 600℃. The activation energy for the growth of nano SnO 2 was calculated to be *** 1 when the annealing temperature was higher than 500℃. The measurements also show that there is a peculiar resistance change varied with temperature for nano SnO *** has relevance to the increase in surface adsorbed oxygen. The selective detectivities to C 4H 10 and petrol can be increased when ruthenium ion was doped in nano SnO 2 as a catalyst and so do the gas sensitivity to CO,CH 4,H 2 etc. when rhodium ion was doped *** detection to the several reducing gas can be realized when the temperature ranged from 260℃ to 400℃.

关键词： sol gel nanometer sized tin oxide gas sensitive property

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