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Issue 13, 2013
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Achieving selectivity in TiO2-based photocatalysis

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Abstract

Nanocrystalline titanium dioxide (NTO) mediated photocatalysis is a powerful tool for the total mineralization of a wide range of organic compounds caused by the in situ generation of hydroxyl radicals upon ultraviolet/visible light irradiation. NTO is well known for its non-selective catalysis, especially in aqueous media. However, making NTO into a selective photocatalyst enables selective degradation of compounds as well as selective formation of valuable organic products. Both selective degradation and selective formation using NTO are based on the same principles of photocatalysis. Selectivity in degradation is achieved in the attraction, adsorption, and mineralization stages of photocatalysis whereas desorption of the oxygenated products, moderate crystallinity of NTO and doping are responsible for selective formation. Recent reports on NTO selective photocatalysis are reviewed in this article according to the chemistry used to achieve selectivity.

Graphical abstract: Achieving selectivity in TiO2-based photocatalysis

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Article information


Submitted
22 Aug 2012
Accepted
05 Dec 2012
First published
07 Dec 2012

RSC Adv., 2013,3, 4130-4140
Article type
Review Article

Achieving selectivity in TiO2-based photocatalysis

M. A. Lazar and W. A. Daoud, RSC Adv., 2013, 3, 4130
DOI: 10.1039/C2RA22665K

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