Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/2399
Title: Photoelectrocatalytic degradation of organic pollutants in aqueous solution using a Pt-TiO₂film
Authors: He, Chun
Abou Asi, Mudar
Xiong, Ya
Shu, Dong
Li, Xiang-zhong
Issue Date: 2009
Publisher: Hindawi Publishing
Source: International journal of photoenergy, 2009, v. 2009, 634369, p. [1-7].
Abstract: A series of Pt-TiO₂ films with nanocrystaline structure was prepared by a procedure of photodeposition and subsequent dip-coating. The Pt-TiO₂ 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-TiO₂ films was evaluated in the photocatalytic (PC) and photoelectrocatalytic (PEC) degradation of formic acid in aqueous solution. Compared with a TiO₂ film, the efficiency of formic acid degradation using the Pt-TiO₂ films was significantly higher in both the PC and PEC processes. The enhancement is attributed to the action of Pt deposits on the TiO₂ surface, which play a key role by attracting conduction band photoelectrons. In the PEC process, the anodic bias externally applied on the illuminated Pt-TiO₂ films can further drive away the accumulated photoelectrons from the metal deposits and promote a process of interfacial charge transfer.
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.
Type: Journal/Magazine Article
URI: http://hdl.handle.net/10397/2399
DOI: 10.1155/2009/634369
ISSN: 1110-662X
Appears in Collections:CEE Journal/Magazine Articles

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