Sensitized photocatalysis of a mixed reactant system of 4-chlorophenol and 4-nitrophenol

Melissa S. Dieckmann*, Kimberly A. Gray, Prashant V. Kamat

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Sensitized photocatalysis has been demonstrated with colored pollutants such as nitrophenols. With visible light excitation of an adsorbed nitrophenolic compound, charge injection into the conduction band of the semiconductor occurs and subsequent transformation of nitrophenols to a variety of products is possible. These phenomena have been observed in powder systems of TiO2, but have not been clearly detailed in aqueous systems. This work reports the results of aqueous TiO2 slurry experiments in which the degradation of 4-nitrophenyl and 4-chlorophenyl is studied in single reactant and mixed reactant systems. The primary objectives of this work are to establish the reaction pathway occurring in sensitized photocatalysis and to determine if sensitization can induce/drive the degradation of non-colored pollutants. The influence of organic concentration, oxygen and light energy are discussed and byproduct data are presented.

Original languageEnglish (US)
Title of host publicationCritical Issues in Water and Wastewater Treatment
EditorsJoseph N. Ryan, Marc Edwards
PublisherPubl by ASCE
Pages726-732
Number of pages7
ISBN (Print)0784400318
StatePublished - Jan 1 1994
EventProceedings of the 1994 National Conference on Environmental Engineering - Boulder, CO, USA
Duration: Jul 11 1994Jul 13 1994

Other

OtherProceedings of the 1994 National Conference on Environmental Engineering
CityBoulder, CO, USA
Period7/11/947/13/94

ASJC Scopus subject areas

  • Environmental Engineering

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