Characterization of mixed TiO2 and SiO2 sol-gel membranes for volatile organochloride sensing

Maria V. Schiza; Delana A. Nivens; Fred P. Milanovich; S. Michael Angel

doi:10.1117/12.339793

23 February 1999 Characterization of mixed TiO2 and SiO2 sol-gel membranes for volatile organochloride sensing

Maria V. Schiza, Delana A. Nivens, Fred P. Milanovich, S. Michael Angel

Proceedings Volume 3540, Chemical, Biochemical, and Environmental Fiber Sensors X; (1999) https://doi.org/10.1117/12.339793
Event: Photonics East (ISAM, VVDC, IEMB), 1998, Boston, MA, United States

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.

Citation Download Citation

Maria V. Schiza, Delana A. Nivens, Fred P. Milanovich, and S. Michael Angel "Characterization of mixed TiO2 and SiO2 sol-gel membranes for volatile organochloride sensing", Proc. SPIE 3540, Chemical, Biochemical, and Environmental Fiber Sensors X, (23 February 1999); https://doi.org/10.1117/12.339793

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