Citation: Hui Xu, Ji-Long Shi, Shaoshuai Lyu, Xianjun Lang. Visible-light photocatalytic selective aerobic oxidation of thiols to disulfides on anatase TiO₂[J]. Chinese Journal of Catalysis, ;2020, 41(10): 1468-1473. doi: 10.1016/S1872-2067(20)63640-3 shu

Visible-light photocatalytic selective aerobic oxidation of thiols to disulfides on anatase TiO₂

a Sauvage Center for Molecular Sciences, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, China;
b Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education), Nankai University, Tianjin 300071, China

Received Date: 23 February 2020
Revised Date: 26 March 2020

Fund Project: This work was supported by the National Natural Science Foundation of China (21773173, 21503086), the Fundamental Research Funds for the Central Universities (2042018kf0212), the 111 project (B12015), and the Start-Up Fund of Wuhan University.

This work presents the visible-light photocatalytic selective oxidation of thiols to disulfides with molecular oxygen (O₂) on anatase TiO₂. The high specific surface area of anatase TiO₂ proved to be especially critical in conferring high photocatalytic activity. Herein, surface complexation between thiol and TiO₂ gives rise to photocatalytic activity under irradiation with 520 nm green light-emitting diodes (LEDs), resulting in excellent reaction activity, substrate scope, and functional group tolerance. The transformation was extremely efficient for the selective oxidation of various thiols, particularly with substrates bearing electron-withdrawing groups (reaction times of less than 10 min). To date, the longest wavelength of visible light that this system can utilize is 520 nm by the surface complex of substrate-TiO₂. Importantly, O₂ was found to act as the electron and proton acceptor, rather than to incorporate into the substrates. Our findings regarding this surface complex-based photocatalytic system can allow one to understand the interaction between the conduction band electrons and O₂.
- Visible light,
- Photocatalysis,
- Titanium dioxide,
- Molecular oxygen,
- Disulfide
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沈阳化工大学材料科学与工程学院沈阳 110142

Visible-light photocatalytic selective aerobic oxidation of thiols to disulfides on anatase TiO2

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通讯作者: 陈斌, bchen63@163.com

Visible-light photocatalytic selective aerobic oxidation of thiols to disulfides on anatase TiO₂