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Photocatalytic Properties of TiO2/Si-NPA Nano Composite Systems |
| SUN Meng1,2;HAO Wei-Chang1;WANG Chun-Zhong1;LI Xin-Jian3;WANG Tian-Min1 |
| 1Center of Material Physics and Chemistry, School of Science, Beijing University of Aeronautics and Astronautics, Beijing 100083
2Department of Technology and Physics, Zhengzhou University of Light Industry, Zhengzhou 450002
3Key Laboratory of Material Physics of MOE, Zhengzhou University, Zhengzhou 450052 |
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| Cite this article: |
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SUN Meng, HAO Wei-Chang, WANG Chun-Zhong et al 2007 Chin. Phys. Lett. 24 256-258 |
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Abstract A new composite system is fabricated by depositing the TiO2 film on a silicon nanoporous pillar array (Si-NPA) and annealing at 500°C using the spin coating method. Such a composite system exhibits a uniform morphology with the micron-dimension pillar array. Photocatalytic properties are investigated based on the degradation of methyl orange dye solution, and the results show that the photocatalytic efficiency of such a nano-composite system is 1.7 times that of the TiO2/glass system. The enhancement of hotocatalytic efficiency is attributed to the large surface area of the TiO2/Si-NPA system.
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| Keywords:
81.20.Fw
81.05.Rm
72.20.Jv
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Published: 01 January 2007
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| PACS: |
81.20.Fw
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(Sol-gel processing, precipitation)
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81.05.Rm
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(Porous materials; granular materials)
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72.20.Jv
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(Charge carriers: generation, recombination, lifetime, and trapping)
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