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Molecules 2014, 19(12), 19557-19572; doi:10.3390/molecules191219557

Some Observations on the Development of Superior Photocatalytic Systems for Application to Water Purification by the “Adsorb and Shuttle” or the Interphase Charge Transfer Mechanisms

1
Department of Chemistry, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
2
Department of Chemistry University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
3
Department of Water Pollution Research, National Research Centre, Cairo 12311, Egypt
4
Department of Civil Engineering, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 21 August 2014 / Revised: 31 October 2014 / Accepted: 5 November 2014 / Published: 26 November 2014
(This article belongs to the Special Issue Photocatalysis)
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Abstract

Adsorb and shuttle (A/S) and interfacial charge transfer are the two major strategies for overcoming recombination in photocatalysis in this era of nanoparticle composites. Their relationships are considered here. A review of key literature is accompanied by a presentation of three new experiments within the overall aim of assessing the relation of these strategies. The cases presented include: A/S by a high silica zeolite/TiO2 composite, charge transfer (CT) between phases in a TiO2/WO3 composite and both A/S and CT by composites of TiO2 with powered activated carbon (AC) and single-walled carbon nanotubes (SWCNT). The opportunities presented by the two strategies for moving toward photocatalysts that could support applications for the removal of contaminants from drinking water or that lead to a practical adsorbent for organics that could be regenerated photocatalytically link this discussion to ongoing research here. View Full-Text
Keywords: TiO2; photocatalysis; adsorb and shuttle; charge transfer; electron storage; carbon; zeolite; WO3 TiO2; photocatalysis; adsorb and shuttle; charge transfer; electron storage; carbon; zeolite; WO3
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Langford, C.; Izadifard, M.; Radwan, E.; Achari, G. Some Observations on the Development of Superior Photocatalytic Systems for Application to Water Purification by the “Adsorb and Shuttle” or the Interphase Charge Transfer Mechanisms. Molecules 2014, 19, 19557-19572.

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