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Title: Photoelectrocatalytic degradation of organic pollutants in aqueous solution using a Pt-TiO?film
Authors: He, C
Abou Asi, M
Xiong, Y
Shu, D
Li, XZ
Issue Date: 2009
Source: International journal of photoenergy, 2009, v. 2009, 634369, p. [1-7]
Abstract: A series of Pt-TiO? films with nanocrystaline structure was prepared by a procedure of photodeposition and subsequent dip-coating. The Pt-TiO? films were characterized by X-ray diffraction, scanning electronic microscope, electrochemical characterization to examine the surface structure, chemical composition, and the photoelectrochemical properties. The photocatalytic activity of the Pt-TiO? films was evaluated in the photocatalytic (PC) and photoelectrocatalytic (PEC) degradation of formic acid in aqueous solution. Compared with a TiO? film, the efficiency of formic acid degradation using the Pt-TiO? films was significantly higher in both the PC and PEC processes. The enhancement is attributed to the action of Pt deposits on the TiO? surface, which play a key role by attracting conduction band photoelectrons. In the PEC process, the anodic bias externally applied on the illuminated Pt-TiO? films can further drive away the accumulated photoelectrons from the metal deposits and promote a process of interfacial charge transfer.
Publisher: Hindawi Publishing
Journal: International journal of photoenergy 
ISSN: 1110-662X
DOI: 10.1155/2009/634369
Rights: ? 2009 Chun He et al. 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.
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