fulltext.study @t Gmail

Photocatalytic degradation of ethidium bromide over titania in aqueous solutions

Paper ID Volume ID Publish Year Pages File Format Full-Text
48450 46507 2007 8 PDF Available
Title
Photocatalytic degradation of ethidium bromide over titania in aqueous solutions
Abstract

The photocatalytic degradation of ethidium bromide (EtBr), a DNA intercalating pollutant, by TiO2-based catalysts has been analyzed. Three different titanium dioxide samples synthesized by sol–gel within reverse microemulsions at different pH and thermal treatments were characterized and studied for the photocatalytic degradation of EtBr by oxygen in aqueous solutions. A commercial titania, Degussa P25, was also examined as a reference material for comparative purposes. Appreciable differences in the final structural and surface properties of these titania samples are observed which include disparities in the anatase/rutile proportions, optical absorption characteristics, EtBr chemisorption and acid–base properties. EtBr photodegradation results suggest that catalytic acid–base properties are the most relevant to explain EtBr chemisorption and play an important role in their final photocatalytic behaviour. It is stressed that photocatalysis can be an interesting alternative to other chemical or biological methods for mineralization of EtBr diluted in aqueous solutions.

Keywords
Photocatalysis; Ethidium bromide; TiO2; Photolysis
First Page Preview
Photocatalytic degradation of ethidium bromide over titania in aqueous solutions
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 76, Issues 3–4, 15 November 2007, Pages 395–402
Authors
, , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis