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Oxidation of Hydrocarbons on the Surface of Tin Dioxide Chemical Sensors
Faculty of Microsystem Electronics and Photonics, Wrocław University of Technology, 50-372 Wrocław, Poland
Faculty of Chemistry, Wrocław University of Technology, 50-373 Wrocław, Poland
* Author to whom correspondence should be addressed.
Received: 2 March 2011; in revised form: 1 April 2011 / Accepted: 6 April 2011 / Published: 15 April 2011
Abstract: 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.
Keywords: gas sensor; molecular structure; alcohol; oxidation reaction; Lewis acidity
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Teterycz, H.; Halek, P.; Wiśniewski, K.; Halek, G.; Koźlecki, T.; Polowczyk, I. Oxidation of Hydrocarbons on the Surface of Tin Dioxide Chemical Sensors. Sensors 2011, 11, 4425-4437.
Teterycz H, Halek P, Wiśniewski K, Halek G, Koźlecki T, Polowczyk I. Oxidation of Hydrocarbons on the Surface of Tin Dioxide Chemical Sensors. Sensors. 2011; 11(4):4425-4437.
Teterycz, Helena; Halek, Patryk; Wiśniewski, Kamil; Halek, Grzegorz; Koźlecki, Tomasz; Polowczyk, Izabela. 2011. "Oxidation of Hydrocarbons on the Surface of Tin Dioxide Chemical Sensors." Sensors 11, no. 4: 4425-4437.