期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 115, 期 1, 页码 316-321出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2005.09.015
关键词
SnO2-In2O3; nanocomposites; toxic gases; gas-sensing properties
This paper aims at preparing gas-sensing nanocomposites, of SnO2-In2O3 using a chemically controlled co-precipitation method and testing their sensing properties for detection of toxic gases. Through manipulating the Sn/In cation ratio, metal salt total concentration, precipitation pH value and aging conditions, the nanocrystalline composite powder was successfully derived with chemical homogeneity and superior thermal stability compared to the single-component oxides. The experimental results showed that these nanocomposites exhibited high sensitivity and selectivity for the detection of CO and NOx, and the sensitivity depended on the composition of the composites, calcination temperature and operating temperature. Their sensing performance was further enhanced through the introduction of a small amount of metals or other oxides as dopants and surface coatings. The gas-sensing mechanism of the nanocomposites was also discussed by X-ray photoelectron spectroscopic (XPS) analysis and temperature-programmed desorption (TPD) studies at gas-sensing operating temperatures. (c) 2005 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据