Photoelectrochemical doping of TiO{sub 2} particles and the effect of charge carrier density on the photocatalytic activity of microporous semiconductor electrode films
Journal Article
·
· Journal of the Electrochemical Society
- Univ. of Texas, Austin, TX (United States). Dept. of Chemistry and Biochemistry
Semiconductor powders have been intensively investigated as effective photocatalysts for chemical storage of light energy and for oxidative detoxification of organic contaminants. Irradiation with a very high intensity laser pulse (355 nm) induces blue color in TiO{sub 2} powders and films. The blue color, which is assigned to the formation of Ti{sup 3+} in the particle, persists in air for several months. With an increase of the concentration of Ti{sup 3+} in a given particle, photocatalytic activity is decreased because of a decrease in the thickness of the space-charge layer as deep Ti{sup 3+} traps are populated.
- Sponsoring Organization:
- Texas Advanced Research Program, TX (United States); USDOE, Washington, DC (United States)
- OSTI ID:
- 428177
- Journal Information:
- Journal of the Electrochemical Society, Vol. 143, Issue 11; Other Information: PBD: Nov 1996
- Country of Publication:
- United States
- Language:
- English
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