Methane gas-sensing and catalytic oxidation activity of SnO2-In2O3 nanocomposites incorporating TiO2

被引：64

作者：

Chen Aifan ^{[1
]}

Bai Shouli ^{[1
]}

Shi Bingjie ^{[1
]}

Liu Zhiyong ^{[1
]}

Li Dianqing ^{[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：

中国国家自然科学基金; 北京市自然科学基金;

关键词：

Nanocomposites; Sn/In/Ti oxides; Gas-sensing; Catalytic activity; Methane;

D O I：

10.1016/j.snb.2008.06.050

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The InO1.5-SnO2 nanocomposites incorporating TiO2 were synthesized by a controlled co-precipitation method as sensing materials of a novel semiconductor CH4 sensor. Through manipulating the total salt concentration, cation ratio, precipitation pH, aging time and calcination temperature, the nanocrystalline composites were successfully derived with chemical homogeneity and superior thermal stability compared to tin oxide. The gas-sensing and catalytic activity for methane oxidation were examined in a micro fixed bed reaction system. The experimental results showed that the nanocomposites exhibited high gas-sensing and catalytic activity, and these performances depended on composition of composites, calcination temperature of precursors and sensor operating temperature. It was found that the sensing behavior was straightforwardly related to the catalytic activity. The sensing and catalytic activity was greatly enhanced by the introduction of metal elements or oxide Surface coatings. To guide for the search of better sensor materials or Suitable additives, it is necessary to understand the sensing mechanism of the semiconductor oxide gas sensors by temperature-programmed desorption (TPD) study and X-ray photoelectron spectroscopic (XPS) analysis. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：7 / 12

页数：6

共 7 条

[1]

Eggins B.R., 2003, CHEM SENSORS BIOSENS

[2]

Huang DX, 2005, CHINESE J INORG CHEM, V21, P1143

[3] SnO2-In2O3 nanocomposites as semiconductor gas sensors for CO and NOx detection [J].

McCue, Justin T. ;

Ying, Jackie Y. .

CHEMISTRY OF MATERIALS, 2007, 19 (05) :1009-1015

[4] Mechanism of sensing CO in nitrogen by nanocrystalline SnO2 and SnO2(Pd) studied by Mossbauer spectroscopy and conductance measurements [J].

Safonova, O ;

Bezverkhy, I ;

Fabrichnyi, P ;

Rumyantseva, M ;

Gaskov, A .

JOURNAL OF MATERIALS CHEMISTRY, 2002, 12 (04) :1174-1178

[5] METHODS FOR THE PREPARATION OF NO, NO2 AND H-2 SENSORS BASED ON TIN OXIDE THIN-FILMS, GROWN BY MEANS OF THE RF MAGNETRON SPUTTERING TECHNIQUE [J].

SBERVEGLIERI, G ;

FAGLIA, G ;

GROPPELLI, S ;

NELLI, P .

SENSORS AND ACTUATORS B-CHEMICAL, 1992, 8 (01) :79-88

[6]

Yamazoe N., 1992, CHEM SENSOR TECHNOLO, V4, P19

[7] Effect of particle size and dopant on properties of SnO2-based gas sensors [J].

Zhang, G ;

Liu, ML .

SENSORS AND ACTUATORS B-CHEMICAL, 2000, 69 (1-2) :144-152

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