Au Modified F-TiO2 for Efficient Photocatalytic Synthesis of Hydrogen Peroxide

Lijuan Li; Bingdong Li; Liwei Feng; Xiaoqiu Zhang; Yuqian Zhang; Qiannan Zhao; Guifu Zuo; Xianguang Meng

doi:10.3390/molecules26133844

Au Modified F-TiO₂ for Efficient Photocatalytic Synthesis of Hydrogen Peroxide

Molecules. 2021 Jun 24;26(13):3844. doi: 10.3390/molecules26133844.

Authors

Lijuan Li¹, Bingdong Li¹, Liwei Feng¹, Xiaoqiu Zhang², Yuqian Zhang¹, Qiannan Zhao¹, Guifu Zuo¹, Xianguang Meng¹

Affiliations

¹ Hebei Provincial Laboratory of Inorganic Nonmetallic Materials, College of Materials Science and Engineering, North China University of Science and Technology, Tangshan 063210, China.
² Chemistry Group, No.2 Experimental Middle School of Dehui, Dehui 130300, China.

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.

Keywords: TiO2; fluorination; hydrogen peroxide; photocatalysis.

Abstract

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