Selective detection of methane in domestic environments using a catalyst sensor system based on Ga2O3

被引：31

作者：

Flingelli, GK ^{[1
]}

Fleischer, MM ^{[1
]}

Meixner, H ^{[1
]}

机构：

[1] Siemens AG, Corp Technol, D-81739 Munich, Germany

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1998年 / 48卷 / 1-3期

关键词：

methane detection; catalytic sensor; Ga2O3 thin film;

D O I：

10.1016/S0925-4005(98)00054-9

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Using high temperature operated Ga2O3 thin films, attempts have been made to realize sensors for methane detection with high stability and reproducibility and quick response. Yet these sensors show high cross sensitivities to ethanol (300 ppm) and other organic solvents that distinctly exceed the measurement effect towards methane (0.5%). Using a thin film Ga2O3-gas sensor which is equipped with a catalytic-preoxidation-filter of porous Ga2O3 and operated at temperatures of 800 degrees C, the cross sensitivities are eliminated. The organic solvents are oxidised while passing the filter and only the quite stable methane is allowed to reach the sensor surface. Selective CH4 detection is possible, even in the (simultaneous) presence of 300 ppm ethanol. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：258 / 262

页数：5

共 7 条

[1] SENSITIVE, SELECTIVE AND STABLE CH4 DETECTION USING SEMICONDUCTING GA2O3 THIN-FILMS [J].