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Proceedings Paper

Characterization of mixed TiO2 and SiO2 sol-gel membranes for volatile organochloride sensing
Author(s): Maria V. Schiza; Delana A. Nivens; Fred P. Milanovich; S. Michael Angel
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Paper Abstract

In our laboratory we are investigating new sensors based on composite sol-gel membranes. We have demonstrated sensors with up to four adjacent SiO2 and TiO2 layers. pH and CO2 sensors have been demonstrated that use single and dual layers, respectively. The CO2 sensor is all solid state and is stable even after being stored dry. The use of TiO2 membranes allows the design of sensors for very unreactive analytes such as perchlorinated species like CCl4 and perchloroethylene (PCE). In this paper we show preliminary data for a PCE sensor that is based on the photooxidative power of a TiO2/SiO2 membrane. Most of our recent work has been determining the physical and chemical properties of the TiO2/SiO2 sol-gel materials and relating these properties to the photoefficiency of PCE photodegradation on these sol-gel materials.

Paper Details

Date Published: 23 February 1999
PDF: 11 pages
Proc. SPIE 3540, Chemical, Biochemical, and Environmental Fiber Sensors X, (23 February 1999);
Show Author Affiliations
Maria V. Schiza, Univ. of South Carolina (United States)
Delana A. Nivens, Univ. of South Carolina (United States)
Fred P. Milanovich, Univ. of South Carolina (United States)
S. Michael Angel, Univ. of South Carolina (United States)

Published in SPIE Proceedings Vol. 3540:
Chemical, Biochemical, and Environmental Fiber Sensors X
Robert A. Lieberman, Editor(s)

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