Sn/In/Ti nanocomposite sensor for CH4 detection

被引：50

作者：

Bai Shouli ^{[1
]}

Chen Liangyuan ^{[2
]}

Yang Pengcheng ^{[1
]}

Luo Ruixian ^{[1
]}

Chen Aifan ^{[1
]}

Chung Chiun Liu ^{[2
]}

机构：

[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

[2] Case Western Reserve Univ, Dept Chem Engn, Cleveland, OH 44106 USA

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2008年 / 135卷 / 01期

基金：

北京市自然科学基金; 中国国家自然科学基金;

关键词：

CH4; sensor; Sn-In-Ti; Nanocomposite; Sensing properties;

D O I：

10.1016/j.snb.2008.06.051

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Novel CH4 gas sensors made of the nanocomposites of Sn/In/Ti oxides were investigated. The nanosized crystalline oxides and their composites were successfully prepared by a sol-gel and controlled precipitation method, respectively, through manipulating the salts concentration, precipitation pH Value, aging time and composition of composites. The derived precursors exhibited superior thermal stability, To ensure Sufficient crystallinity and insignificant grain growth of the materials, the appropriate calcination temperatures were 600 degrees C for 4h and 700 degrees C for 2h for the precursors of oxides and composites, respectively. The performance and structure of the composites were characterized by EDX, TEM, BET, TG-DTA and XRD. The sensing tests showed that these nanocomposites exhibited high response and selectivity for the detection of CH4 at operating temperatures between 200 degrees C and 250 degrees C and the response depended on the composition of composites, calcination temperature, operating temperature and gas concentration in air. The gas sensing mechanism of the sensor s was also discussed by X-ray photoelectron spectroscopic (XPS) and temperature-programmed desorption (TPD) studies. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：1 / 6

页数：6

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