Degradation processes of organic compounds over UV-irradiated TiO2. Effect of ozone

Degradation processes of organic compounds over UV-irradiated TiO2. Effect of ozone UV irradiation of TiO2 promotes electrons from the valence band to the conduction band. The capabilities of the resulting redox system to degrade organic pollutants in water and the variety of products formed is illustrated here by the case of 2,3-dimethylpyrazine. Two debated questions, viz. (i) which electron-donors are implicated to fill in the electron deficiencies in the valence band? and (ii) is superoxide chemically involved in the photocatalytic degradations?, are addressed by using quinoline, the photo-Fenton reaction and superoxide dismutase. Finally, the favourable effect of ozone is exemplified by the photoctalytic removal of monochloroacetic acid. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Degradation processes of organic compounds over UV-irradiated TiO2. Effect of ozone

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Publisher
Brill Academic Publishers
Copyright
Copyright © 2000 by VSP
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1163/156856700X00200
Publisher site
See Article on Publisher Site

Abstract

UV irradiation of TiO2 promotes electrons from the valence band to the conduction band. The capabilities of the resulting redox system to degrade organic pollutants in water and the variety of products formed is illustrated here by the case of 2,3-dimethylpyrazine. Two debated questions, viz. (i) which electron-donors are implicated to fill in the electron deficiencies in the valence band? and (ii) is superoxide chemically involved in the photocatalytic degradations?, are addressed by using quinoline, the photo-Fenton reaction and superoxide dismutase. Finally, the favourable effect of ozone is exemplified by the photoctalytic removal of monochloroacetic acid.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Jan 1, 2000

References

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