Heterostructured Nitrogen and Sulfur co-Doped Black TiO2/g-C3N4 Photocatalyst with Enhanced Photocatalytic Activity

doi:10.1007/s40242-020-0175-2

Chemical Research in Chinese Universities ›› 2020, Vol. 36 ›› Issue (6): 1045-1052.doi: 10.1007/s40242-020-0175-2

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Heterostructured Nitrogen and Sulfur co-Doped Black TiO₂/g-C₃N₄ Photocatalyst with Enhanced Photocatalytic Activity

MENG Zeshuo¹, ZHOU Bo^1,3, XU Jian¹, LI Yaxin¹, HU Xiaoying², TIAN Hongwei¹

1. Key Laboratory of Automobile Materials of Ministry of Education, School of Materials Science and Engineering, Jilin University, Changchun 130012, P. R. China;
2. Laboratory of Materials Design and Quantum Simulation, College of Science, Changchun University, Changchun 130022, P. R. China;
3. State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan Iron and Steel Group Corporation, Anshan 114009, P. R. China

Received:2020-06-07 Revised:2020-07-30 Online:2020-12-01 Published:2020-12-03
Contact: TIAN Hongwei E-mail:tianhw@jlu.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(No.51472106), the Natural Science Foundation of Jilin Province, China(Nos.20180101065JC, 20190201129JC), the International Science and Technology Cooperation Project of Jilin Province, China(No.20200801059GH), the Industrial Technology Research and Development Project of Development and Reform Commission of Jilin Province, China(Nos.2019C045-3, 2019C042-6).

Abstract

Abstract: Conventional titanium dioxide(TiO₂) photocatalyst could absorb only ultraviolet light due to its wide bandgap. In this paper, black TiO₂ with narrow bandgap was prepared by introducing oxygen vacancies. Meanwhile, nitrogen(N) and sulfur(S) elements were doped to further broaden the visible light response range of TiO₂(NS-BT), and then heterostructured N,S-doped black TiO₂/g-C₃N₄(CN/NS-BT) was successfully constructed by easily accessible route. The formation of CN/NS-BT heterojunction structure increased the generation and separation efficiency of photogenerated electron-hole pairs, as well as accelerated the transfer rate of the carriers. The as-prepared CN/NS-BT exhibited excellent photocatalytic performance towards the degradation of Rhodamine B(RhB) under visible light irradiation with satisfactory stability. The apparent reaction rate constant of CN/NS-BT(0.0079) was 15.8-fold higher than that of commercial P25(0.0005). The structure, morphology, chemical composition and optical properties of the as-prepared CN/NS-BT were characterized by various analytical methods, and possible photocatalytic enhancement mechanism was proposed. Overall, CN/NS-BT composites look promising as photocatalytic material for future environmental treatment.

Key words: Black TiO₂, g-C₃N₄, N, S doping, Heterostructure photocatalyst, Visible light photodegradation

MENG Zeshuo, ZHOU Bo, XU Jian, LI Yaxin, HU Xiaoying, TIAN Hongwei. Heterostructured Nitrogen and Sulfur co-Doped Black TiO₂/g-C₃N₄ Photocatalyst with Enhanced Photocatalytic Activity[J]. Chemical Research in Chinese Universities, 2020, 36(6): 1045-1052.

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Heterostructured Nitrogen and Sulfur co-Doped Black TiO₂/g-C₃N₄ Photocatalyst with Enhanced Photocatalytic Activity

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