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Photocatalytic degradation of nitrobenzenes with combustion synthesized nano-TiO2

Paper ID Volume ID Publish Year Pages File Format Full-Text
28775 44091 2006 7 PDF Available
Title
Photocatalytic degradation of nitrobenzenes with combustion synthesized nano-TiO2
Abstract

The photocatalytic degradation of nitrobenzene and substituted nitrobenzenes under UV exposure was investigated with combustion synthesized nano-TiO2 and commercial TiO2 catalyst, Degussa P-25. The experimental data indicated that the photodegradation kinetics was first order. The photocatalytic degradation rates were considerably higher when catalyzed with combustion synthesized TiO2 compared to that of Degussa P-25. The degradation rate coefficients followed the order: 1-chloro,2,4-dinitrobenzene ≃≃ 4-nitrophenol > 2-nitrophenol > 1-chloro,4-nitrobenzene > 3-nitrophenol > 2,4-dinitrophenol > 1-chloro,2-nitrobenzene > nitrobenzene > 1,3-dinitrobenzene. Plausible mechanisms and reasons for the observation of the above order are discussed.

Keywords
Photocatalytic degradation; Nano-TiO2; Nitrobenzene; Nitrophenol; Chloronitrobenzene; Kinetic analysis; Combustion-synthesized catalyst; Degussa P-25
First Page Preview
Photocatalytic degradation of nitrobenzenes with combustion synthesized nano-TiO2
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 178, Issue 1, 20 February 2006, Pages 1–7
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering