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Catalysts 2013, 3(1), 189-218; doi:10.3390/catal3010189

Heterogeneous Photocatalysis: Recent Advances and Applications

1,*  and 2
1 Centre for Environmental and Marine Sciences, Faculty of Science, University of Hull, Scarborough Campus, Scarborough YO11 3AZ, UK 2 Tech Innovation, Capenhurst Technology Park, Capenhurst, Chester, CH1 6EH, UK
* Author to whom correspondence should be addressed.
Received: 28 November 2012 / Revised: 18 December 2012 / Accepted: 25 January 2013 / Published: 1 March 2013
(This article belongs to the Special Issue Photocatalysts)
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Semiconductor heterogeneous photocatalysis, the subject of this review, is a versatile, low-cost and environmentally benign treatment technology for a host of pollutants. These may be of biological, organic and inorganic in origin within water and air. The efficient and successful application of photocatalysis demands that the pollutant, the catalyst and source of illumination are in close proximity or contact with each other. The ability of advanced oxidation technology to remove low levels of persistent organic pollutants as well as microorganisms in water has been widely demonstrated and, progressively, the technology is now being commercialized in many areas of the world including developing nations. This review considers recent developments in the research and application of heterogeneous semiconductor photocatalysis for the treatment of low-level concentrations of pollutants in water and air using titanium dioxide as a “model” semiconductor. The review considers charge transport characteristics on the semiconductor surface, photocatalyst reactor design and organic degradation mechanistic pathways. The effects of photoreactor operating parameters on the photocatalytic process are discussed in addition to mineralization and disinfection kinetics.
Keywords: semiconductor; photocatalysis; band gap; illumination; reactor; catalyst; mineralization; degradation semiconductor; photocatalysis; band gap; illumination; reactor; catalyst; mineralization; degradation
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Ibhadon, A.O.; Fitzpatrick, P. Heterogeneous Photocatalysis: Recent Advances and Applications. Catalysts 2013, 3, 189-218.

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