Oxidation of Hydrocarbons on the Surface of Tin Dioxide Chemical Sensors

Sensors

Helena Teterycz²  Patryk Halek²  Kamil Wiśniewski²  Grzegorz Halek²  Tomasz Koźlecki¹ 

[1] Faculty of Chemistry, Wrocław University of Technology, 50-373 Wrocław, Poland; E-Mails:;Faculty of Microsystem Electronics and Photonics, Wrocław University of Technology, 50-372 Wrocław, Poland; E-Mails:

关键词: gas sensor;    molecular structure;    alcohol;    oxidation reaction;    Lewis acidity;   

DOI  :  10.3390/s110404425

来源: mdpi

【 摘 要 】

The paper presents the results of our investigation on the effect of the molecular structure of organic vapors on the characteristics of resistive chemical gas sensors. The sensors were based on tin dioxide and prepared by means of thick film technology. The electrical and catalytic examinations showed that the abstraction of two hydrogen atoms from the organic molecule and formation of a water in result of reaction with a chemisorbed oxygen ion, determine the rate of oxidation reactions, and thus the sensor performance. The rate of the process depends on the order of carbon atoms and Lewis acidity of the molecule. Therefore, any modification of the surface centers of a sensor material, modifies not only the sensor sensitivity, but also its selectivity.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.