Au Modified F-TiO2 for Efficient Photocatalytic Synthesis of Hydrogen Peroxide |
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| Authors: | Lijuan Li Bingdong Li Liwei Feng Xiaoqiu Zhang Yuqian Zhang Qiannan Zhao Guifu Zuo Xianguang Meng |
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| Institution: | 1.Hebei Provincial Laboratory of Inorganic Nonmetallic Materials, College of Materials Science and Engineering, North China University of Science and Technology, Tangshan 063210, China; (L.L.); (B.L.); (L.F.); (Y.Z.); (Q.Z.); (G.Z.);2.Chemistry Group, No.2 Experimental Middle School of Dehui, Dehui 130300, China; |
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| Abstract: | In this work, Au-modified F-TiO2 is developed as a simple and efficient photocatalyst for H2O2 production under ultraviolet light. The Au/F-TiO2 photocatalyst avoids the necessity of adding fluoride into the reaction medium for enhancing H2O2 synthesis, as in a pure TiO2 reaction system. The F− modification inhibits the H2O2 decomposition through the formation of the ≡Ti–F complex. Au is an active cocatalyst for photocatalytic H2O2 production. We compared the activity of TiO2 with F− modification and without F− modification in the presence of Au, and found that the H2O2 production rate over Au/F-TiO2 reaches four times that of Au/TiO2. In situ electron spin resonance studies have shown that H2O2 is produced by stepwise single-electron oxygen reduction on the Au/F-TiO2 photocatalyst. |
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| Keywords: | photocatalysis hydrogen peroxide fluorination TiO2 |
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