Role of water vapour in the interaction of SnO2 gas sensors with CO and CH4

被引：47

作者：

Ionescu, R ^{[1
]}

Vancu, A ^{[1
]}

Moise, C ^{[1
]}

Tomescu, A ^{[1
]}

机构：

[1] Natl Inst Mat Phys, Bucharest 76900, Magurele, Romania

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1999年 / 61卷 / 1-3期

关键词：

tin dioxide; gas sensors; humidity;

D O I：

10.1016/S0925-4005(99)00277-4

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

New aspects of the influence of water vapour in the interaction of SnO2 gas sensors with different reducing gases are evidenced by an original experimental method. This consists in measuring the conductance transients during and after rapid transitions from dry into humid air containing identical concentrations of methane and CO, respectively. The results indicate that while methane and water compete in reacting with one type of oxygen ions on the surface, CO reacts mainly with another type of surface oxygen, almost insensitive to water. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：39 / 42

页数：4