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Spectral dependences of the activity and selectivity of N-doped TiO2 in photodegradation of phenols

Paper ID Volume ID Publish Year Pages File Format Full-Text
27298 44015 2009 7 PDF Available
Title
Spectral dependences of the activity and selectivity of N-doped TiO2 in photodegradation of phenols
Abstract

In present study we report the spectral dependencies of the quantum yield of phenol and 4-chlorophenol photodegradation over N-doped TiO2 and the selectivity of the photocatalyst toward formation the major intermediates. Applying the theoretical model developed earlier [A.V. Emeline, V.K. Ryabchuk, N. Serpone, J. Phys. Chem. B. 103 (1999) 1316; A.V. Emeline, A.V. Frolov, V.K. Ryabchuk, N. Serpone, J. Phys. Chem. B 107 (2003) 7109] for analysis of the experimental spectral dependencies we conclude that extrinsic N-doped induced absorption is formed by overlapping of several single absorption bands, which presumably correspond to different intrinsic defects (color centers) in TiO2 distinguished by different efficiency of photogeneration of charge carriers. It is also inferred that measurement and corresponding analysis of spectral dependencies of the quantum yield and selectivity of heterogeneous photochemical reactions can be considered as a powerful spectroscopic mean to deconvolve the complex non-resolved absorption spectrum of solids.

Keywords
Photocatalysis; Visible-light photocatalyst; Quantum yield; Selectivity; Doping
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Spectral dependences of the activity and selectivity of N-doped TiO2 in photodegradation of phenols
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 207, Issue 1, 5 September 2009, Pages 13–19
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
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