Journal
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
Volume 150, Issue 2-3, Pages 155-163Publisher
ELSEVIER
DOI: 10.1016/j.elspec.2005.01.294
Keywords
anatase; rutile; mixed phase TiO2; electron paramagnetic resonance (EPR); photocatalysis; interfacial charge transfer
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Charge separation processes in mixed phase TiO2 photocatalysts are investigated by electron paramagnetic resonance (EPR) spectroscopy. The mechanisms of interfacial electron transfer, subsequent charge migration and recombination at surface sites, and other interfacial effects on chlorophenol/TiO2 chemistry have been probed. Distorted interfacial sites have been observed and are proposed as catalytically reactive hot spots. This detailed knowledge of charge transfer processes is critical to the nanoscate design of catalysts and subsequent improvement of catalytic efficiency. (c) 2005 Elsevier B.V. All rights reserved.
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