Enhancing Photocatalytic Performance through Tuning the Interfacial Process between -Assembled and Pt-Loaded Microspheres
This work reports on a simple two-step approach to rutile TiO2-assembled microspheres loaded by Pt with an aim to tune semiconductor-metal interfacial processes for enhancing the photocatalytic performance. Systematic sample characterizations and structural analysis indicate that Pt loading did not...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2012/913630 |
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| _version_ | 1832549877797617664 |
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| author | Jun Zhang Liping Li Guangshe Li |
| author_facet | Jun Zhang Liping Li Guangshe Li |
| author_sort | Jun Zhang |
| collection | DOAJ |
| description | This work reports on a simple two-step approach to rutile TiO2-assembled microspheres loaded by Pt with an aim to tune semiconductor-metal interfacial processes for enhancing the photocatalytic performance. Systematic sample characterizations and structural analysis indicate that Pt loading did not produce any significant influences on the lattice structure of TiO2-assembled microspheres. Instead, upon Pt loading, Schottky barrier was formed in the interfaces between microspheres and Pt nanoparticles, which inhabited efficiently the recombination of photo-generated electron-hole pairs essential for the photocatalytic activities. In addition, TiO2 microspheres also showed a capacity of electrons storage and releasing as represented by a high dielectric constant, which increased the utility rate of photogenerated electrons. All these structural advantages contribute to the excellent photocatalytic activity under ultraviolet light irradiation. The interfacial process between microspheres and Pt nanoparticles was further tuned through adjusting the loading Pt content of metal Pt. As a consequence, the best photocatalytic activity on TiO2 was obtained at 0.85 wt% Pt loading, above or below which photocatalytic activity was apparently decreased. |
| format | Article |
| id | doaj-art-b5057f88936148138b5432c602e019e8 |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-b5057f88936148138b5432c602e019e82025-02-03T06:08:21ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2012-01-01201210.1155/2012/913630913630Enhancing Photocatalytic Performance through Tuning the Interfacial Process between -Assembled and Pt-Loaded MicrospheresJun Zhang0Liping Li1Guangshe Li2School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, ChinaKey Lab of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, ChinaState Key Lab of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, ChinaThis work reports on a simple two-step approach to rutile TiO2-assembled microspheres loaded by Pt with an aim to tune semiconductor-metal interfacial processes for enhancing the photocatalytic performance. Systematic sample characterizations and structural analysis indicate that Pt loading did not produce any significant influences on the lattice structure of TiO2-assembled microspheres. Instead, upon Pt loading, Schottky barrier was formed in the interfaces between microspheres and Pt nanoparticles, which inhabited efficiently the recombination of photo-generated electron-hole pairs essential for the photocatalytic activities. In addition, TiO2 microspheres also showed a capacity of electrons storage and releasing as represented by a high dielectric constant, which increased the utility rate of photogenerated electrons. All these structural advantages contribute to the excellent photocatalytic activity under ultraviolet light irradiation. The interfacial process between microspheres and Pt nanoparticles was further tuned through adjusting the loading Pt content of metal Pt. As a consequence, the best photocatalytic activity on TiO2 was obtained at 0.85 wt% Pt loading, above or below which photocatalytic activity was apparently decreased.http://dx.doi.org/10.1155/2012/913630 |
| spellingShingle | Jun Zhang Liping Li Guangshe Li Enhancing Photocatalytic Performance through Tuning the Interfacial Process between -Assembled and Pt-Loaded Microspheres International Journal of Photoenergy |
| title | Enhancing Photocatalytic Performance through Tuning the Interfacial Process between -Assembled and Pt-Loaded Microspheres |
| title_full | Enhancing Photocatalytic Performance through Tuning the Interfacial Process between -Assembled and Pt-Loaded Microspheres |
| title_fullStr | Enhancing Photocatalytic Performance through Tuning the Interfacial Process between -Assembled and Pt-Loaded Microspheres |
| title_full_unstemmed | Enhancing Photocatalytic Performance through Tuning the Interfacial Process between -Assembled and Pt-Loaded Microspheres |
| title_short | Enhancing Photocatalytic Performance through Tuning the Interfacial Process between -Assembled and Pt-Loaded Microspheres |
| title_sort | enhancing photocatalytic performance through tuning the interfacial process between assembled and pt loaded microspheres |
| url | http://dx.doi.org/10.1155/2012/913630 |
| work_keys_str_mv | AT junzhang enhancingphotocatalyticperformancethroughtuningtheinterfacialprocessbetweenassembledandptloadedmicrospheres AT lipingli enhancingphotocatalyticperformancethroughtuningtheinterfacialprocessbetweenassembledandptloadedmicrospheres AT guangsheli enhancingphotocatalyticperformancethroughtuningtheinterfacialprocessbetweenassembledandptloadedmicrospheres |