Photoelectrocatalytic Degradation of Organic Pollutants in Aqueous Solution Using a Pt-TiO2 Film
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 c...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2009-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2009/634369 |
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| author | Chun He Mudar Abou Asi Ya Xiong Dong Shu Xiangzhong Li |
| author_facet | Chun He Mudar Abou Asi Ya Xiong Dong Shu Xiangzhong Li |
| author_sort | Chun He |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-267130f3a0cf470e914a3eda6170360d |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2009-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-267130f3a0cf470e914a3eda6170360d2025-02-03T01:12:26ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2009-01-01200910.1155/2009/634369634369Photoelectrocatalytic Degradation of Organic Pollutants in Aqueous Solution Using a Pt-TiO2 FilmChun He0Mudar Abou Asi1Ya Xiong2Dong Shu3Xiangzhong Li4School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, ChinaSchool of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, ChinaSchool of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, ChinaKey Lab of Electrochemical Technology on Energy Storage and Power Generation in Guangdong Universities, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, ChinaDepartment of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hong Kong, ChinaA 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.http://dx.doi.org/10.1155/2009/634369 |
| spellingShingle | Chun He Mudar Abou Asi Ya Xiong Dong Shu Xiangzhong Li Photoelectrocatalytic Degradation of Organic Pollutants in Aqueous Solution Using a Pt-TiO2 Film International Journal of Photoenergy |
| title | Photoelectrocatalytic Degradation of Organic Pollutants in Aqueous Solution Using a Pt-TiO2 Film |
| title_full | Photoelectrocatalytic Degradation of Organic Pollutants in Aqueous Solution Using a Pt-TiO2 Film |
| title_fullStr | Photoelectrocatalytic Degradation of Organic Pollutants in Aqueous Solution Using a Pt-TiO2 Film |
| title_full_unstemmed | Photoelectrocatalytic Degradation of Organic Pollutants in Aqueous Solution Using a Pt-TiO2 Film |
| title_short | Photoelectrocatalytic Degradation of Organic Pollutants in Aqueous Solution Using a Pt-TiO2 Film |
| title_sort | photoelectrocatalytic degradation of organic pollutants in aqueous solution using a pt tio2 film |
| url | http://dx.doi.org/10.1155/2009/634369 |
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