Selective detection of methane and butane by temperature modulation in iron doped tin oxide sensors

被引：117
作者：
Chakraborty, S. [1 ]
Sen, A. [1 ]
Maiti, H. S. [1 ]
机构：
[1] Cent Glass & Ceram Res Lab, Sensor & Actuator Sect, Electroceram Div, Kolkata 700032, W Bengal, India
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2006年 / 115卷 / 02期
关键词：
gas sensor; methane; butane; tin dioxide;
D O I：
10.1016/j.snb.2005.10.046
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
In the present study we find that it is possible to develop sensors based on iron doped tin dioxide, which can detect both methane and butane (present in CNG and LPG, respectively) at a temperature of 350 degrees C. However, the same sensors can selectively detect butane at a temperature of 425 degrees C. Such differential behaviour can be explained by considering the decrease in the number and/or strength of Lewis acid sites on SnO2 due to Fe-doping and the role of chain length on the adsorption-desorption characteristics of alkanes. However, the incorporation of palladium as a catalyst in Fe-doped SnO2 sensors removes the typical selectivity, and the temperatures of the maximum response coincide for methane and butane. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：610 / 613
页数：4
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