Citation: Qiang Hao, Ci'an Xie, Yongming Huang, Daimei Chen, Yiwen Liu, Wei Wei, Bing-Jie Ni. Accelerated separation of photogenerated charge carriers and enhanced photocatalytic performance of g-C₃N₄ by Bi₂S₃ nanoparticles[J]. Chinese Journal of Catalysis, ;2020, 41(2): 249-258. doi: S1872-2067(19)63450-9 shu

Accelerated separation of photogenerated charge carriers and enhanced photocatalytic performance of g-C₃N₄ by Bi₂S₃ nanoparticles

Qiang Hao ^a,b, ,
Ci'an Xie ^a ,
Yongming Huang ^a ,
Daimei Chen ^a ,
Yiwen Liu ^b ,
Wei Wei ^b ,
Bing-Jie Ni ^b

a Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, School of Materials Science and Technology, China University of Geosciences Beijing, Beijing 100083, China;
b Centre for Technology in Water and Wastewater (CTWW), School of Civil and Environmental Engineering, University of Technology Sydney (UTS), Sydney, NSW 2007, Australia

Received Date: 1 July 2019
Revised Date: 12 July 2019

Fund Project: This work was supported by the National Natural Science Foundation of China (21577132). Bing-Jie Ni acknowledges the support of the Australian Research Council (ARC) Future Fellowship (FT160100195). The authors are grateful to the research collaboration, especially Dr. Guojin Zhang's help of LC-MSMS.

Employing photothermal conversion to improve the photocatalytic activity of g-C₃N₄ is rarely reported previously. Herein, different ratios of g-C₃N₄/Bi₂S₃ heterojunction materials are synthesized by a facile ultrasonic method. Advanced characterizations such as X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and high-resolution transmission electron microscopy are employed to analyze the morphology and structure of the prepared materials. Compared with sole counterparts, the heterojunction materials CN-BiS-2 exhibit significantly enhanced photocatalytic performance, which is 2.05-fold as g-C₃N₄ and 4.42-fold as Bi₂S₃. A possible degradation pathway of methylene blue (MB) was proposed. Based on the photoproduced high-energy electrons and photothermal effect of Bi₂S₃, the transfer and separation of electron-hole pairs are greatly enhanced and more active species are produced. In addition, the relatively high utilization efficiency of solar energy has synergistic effect for the better photocatalytic performance.
- Graphitic carbon nitride,
- Bismuth sulfide,
- Photocatalyst,
- Wastewater treatment,
- High-energy electron
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Accelerated separation of photogenerated charge carriers and enhanced photocatalytic performance of g-C₃N₄ by Bi₂S₃ nanoparticles