Photocatalytic degradation of nitrobenzenes with combustion synthesized nano-TiO2

Priya, MH and Madras, Giridhar (2006) Photocatalytic degradation of nitrobenzenes with combustion synthesized nano-TiO2. In: Journal of Photochemistry and Photobiology A: Chemistry, 178 (1). pp. 1-7.

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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,14-dinitrobenzene similar or equal to 4-nitrophenot > 2-nitrophenol > 1-chloro.4-nitrobenzene > 3-niti-ophenol > 2,4-dinitrophenol > 1-chloro,2-nitrobenzene > nitrobenzene > 1,3-dinitrobenzene. Plausible mechanisms and reasons for the observation of the above order are discussed.

Item Type:	Journal Article
Publication:	Journal of Photochemistry and Photobiology A: Chemistry
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Photocatalytic degradation; Nano-TiO2; Nitrobenzene; Nitrophenol; Chloronitrobenzene; Kinetic analysis; Combustion-synthesized catalyst; Degussa P-25.
Department/Centre:	Division of Mechanical Sciences > Chemical Engineering
Date Deposited:	16 Sep 2010 09:38
Last Modified:	19 Sep 2010 06:15
URI:	http://eprints.iisc.ac.in/id/eprint/31793

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