Two-step preparation of Ag/tetrapod-like ZnO with photocatalytic activity by thermal evaporation and sputtering |
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Authors: | Tian Tan Ying Li Yi Liu Bo Wang Xuemei Song Er Li Hao Wang Hui Yan |
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Affiliation: | aThe Thin Film Laboratory, Beijing University of Technology, Pingleyuan 100, Chaoyang District, Beijing 100022, PR China |
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Abstract: | A two-step method to synthesize metal–semiconductor heterostructure photocatalyst is presented in this research. Based on the tetrapod-like zinc oxide (T-ZnO) deposited by thermal evaporation, Ag/T-ZnO heterostructure is synthesized by RF magnetron sputtering method in this two-step preparation technique. The structure and the photocatalytic properties of the Ag/T-ZnO were studied in detail. The Ag/T-ZnO heterostructure exhibits better photocatalytic activity than that of the pure T-ZnO and there is an optimum sputtering time and sputtering power for the heterostructure's photocatalytic activity. The essential photocatalytic mechanism of this heterostructure have been discussed and the enhanced photocatalytic activity indicates the feasibility of this novel two-step method which may be developed to a promising synthesis technique. |
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Keywords: | Magnetron sputtering Thermal evaporation Ag/ZnO Complex photocatalyst |
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