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Proceedings Paper

Monitoring the electrical response of photoinduced organic oxidation on TiO2 surfaces
Author(s): Laura R. Skubal; Michael C. Vogt; Natalia K. Meshkov
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Paper Abstract

12 Gaseous photo-induced oxidations of a variety of organic compounds by titanium dioxide (TiO2) have been studied extensively in the literature. The response of the organic to photochemical reactions with TiO2 and the extent of organic oxidation are typically measured by monitoring the initial concentration of organic and the oxidation by- products using gas chromatography. In this study, TiO2 sensors are produced by coating and drying films of Degussa P25 TiO2 onto Al2O3 substrates. Tests are conducted at ambient temperatures in a controlled atmospheric cell. Electrical responses from the TiO2 sensors are monitored as the sensors are exposed to a variety of organic compounds in the presence of ultraviolet light. Unique voltammetric `signatures' are obtained from the sensors as they react with specific gaseous organics. These signatures can be used to distinguish and identify gaseous constituents.

Paper Details

Date Published: 14 February 2001
PDF: 8 pages
Proc. SPIE 4199, Water, Ground, and Air Pollution Monitoring and Remediation, (14 February 2001); doi: 10.1117/12.417376
Show Author Affiliations
Laura R. Skubal, Argonne National Lab. (United States)
Michael C. Vogt, Argonne National Lab. (United States)
Natalia K. Meshkov, Argonne National Lab. (United States)

Published in SPIE Proceedings Vol. 4199:
Water, Ground, and Air Pollution Monitoring and Remediation
Tuan Vo-Dinh; Robert L. Spellicy, Editor(s)

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