Fast-response and high sensitivity gas sensors based on SnO2 hollow spheres

被引：63

作者：

Tan, Yu ^{[1
,2
]}

Li, Chengchao ^{[1
]}

Wang, Yong ^{[2
]}

Tang, Jianfeng ^{[2
]}

Ouyang, Xicheng ^{[2
]}

机构：

[1] Hunan Univ, Micronano Technol Res Ctr, Changsha 410082, Hunan, Peoples R China

[2] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China

来源：

THIN SOLID FILMS | 2008年 / 516卷 / 21期

基金：

中国国家自然科学基金;

关键词：

SnO2; hollow spheres; sensitivity; gas sensors; response; recovery;

D O I：

10.1016/j.tsf.2008.04.105

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

SnO2 hollow nanospheres have been synthesized by heat treatment of a mixture composed of SnCl4 and carbon microspheres. The SnO2 nanospheres are 100 nm in size and composed of large amount of SnO2 nanocrystals with diameters of similar to 6 nm, which is close to two times of the Debye length of SnO2. It was found that the sensitivity to 1000 ppm ethanol obtained with SnO2 hollow nanosphere-based sensors is as high as 75. The response and recovery time are only 4 and 10 s, respectively. Such excellent sensing properties can be ascribed to the small-size nanocrystals and porous structure of SnO2 hollow nanospheres, which lead to large diffusion constant. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：7840 / 7843

页数：4

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