Photoelectrocatalytic Degradation of Organic Pollutants in Aqueous Solution Using a Pt-TiO2Film | Zendy

Chun He | Zendy; Mudar Abou Asi | Zendy; Ya Xiong | Zendy; Dong Shu | Zendy; Xiangzhong Li | Zendy

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Photoelectrocatalytic Degradation of Organic Pollutants in Aqueous Solution Using a Pt-TiO₂Film

Author(s) -

Chun He,

Mudar Abou Asi,

Ya Xiong,

Dong Shu,

Xiangzhong Li

Publication year - 2009

Publication title -

international journal of photoenergy

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.426

H-Index - 51

eISSN - 1687-529X

pISSN - 1110-662X

DOI - 10.1155/2009/634369

Subject(s) - materials science , algorithm , aqueous solution , chemistry , computer science

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

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