Water purification using solar energy: effect of sulphur on photocatalytic properties of TiO₂

Authors: Lamo, M. P. Bello; Nowotny, J.

Source: Energy Materials: Materials Science and Engineering for Energy Systems, Volume 4, Number 3, September 2009 , pp. 150-158(9)

Publisher: Maney Publishing

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Abstract:

The present work considers the effect of sulphur on several properties of titanium dioxide (TiO₂) including electronic structure, defect disorder and photocatalytic properties. While the reports on the mechanism of sulphur incorporation into the TiO₂ lattice are conflicting, there is a consensus that sulphur leads to reduction of band gap and enhanced photocatalytic performance. The latter effect suggests that light absorption, which is determined by an electronic structure, plays the key role in the conversion of the light energy into the chemical energy that is required for photocatalytic decomposition of organic contaminants in water. Analysis of the reported data suggests that different processing procedures result in different doping mechanisms. It is argued that most of the experimental data reported so far are not well defined and, therefore, are not compatible. Consequently, the progress in the science of photocatalysis requires collection of empirical data that are well defined.

Keywords: PHOTOCATALYST; DOPING; TIO2; VISIBLE LIGHT; SOLAR ENERGY; WATER PURIFICATION

Document Type: Review Article

DOI: http://dx.doi.org/10.1179/1748924510Y.0000000002

Affiliations: Solar Energy Technologies, University Western Sydney, Penrith South DC NSW 1797, Australia

Publication date: 2009-09-01

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From volume 5 onwards, Energy Materials is published as a virtual journal covering current research on materials for energy generation and storage drawn from the journals of the Institute of Materials, Minerals and Mining. The content reflects the broad range of materials contributions within this increasingly important sector and serves as a focus for the growing community with an interest in energy materials research and applications.
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