Highly sensitive and selective room temperature alcohol gas sensors based on TeO2 nanowires

被引：21

作者：

Shen, Yanbai ^{[1
]}

Zhao, Sikai ^{[1
]}

Ma, Jiawei ^{[1
,2
]}

Chen, Xiangxiang ^{[1
]}

Wang, Wei ^{[1
]}

Wei, Dezhou ^{[1
]}

Gao, Shuling ^{[1
]}

Liu, Wengang ^{[1
]}

Han, Cong ^{[1
]}

Cui, Baoyu ^{[1
]}

机构：

[1] Northeastern Univ, Coll Resources & Civil Engn, Shenyang 110819, Peoples R China

[2] Northern Engn & Technol Corp, Dalian 116600, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 664卷

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

Tellurium oxide; Nanowires; Alcohol; Gas sensor; SENSING PROPERTIES; MICROSTRUCTURE; NANORODS; NANOSTRUCTURE; NANOPARTICLES; PERFORMANCE; ASSEMBLIES; DEVICES; GROWTH; CVD;

D O I：

10.1016/j.jallcom.2015.12.247

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

TeO2 nanowires were synthesized by thermal evaporation of Te powders in air at ambient pressure. The crystal structure, morphology, and alcohol sensing properties of TeO2 nanowires were investigated. Structural characterizations showed that TeO2 nanowires with a tetragonal structure were approximately 70-200 nm in diameter and several hundreds of micrometers to 2 mm in length. No Au nanoparticles were observed at any ends of TeO2 nanowires, revealing that the growth process was dominated by the vapour-solid growth mechanism. Gas sensing measurements indicated that TeO2 nanowires with an n-type conduction showed a quick and reversible response to ethanol gas at room temperature. The response increased in the order of methanol > ethanol > propanol under the same conditions as well as with increasing alcohol gas concentration. The results demonstrate the feasibility of using TeO2 nanowires for sensing alcohol gases. (c) 2015 Elsevier B.V. All rights reserved.

引用

页码：229 / 234

页数：6

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