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Enhanced photo-induced charge separation and sun light-driven photocatalytic performance of g-C3N4 modified by phosphate

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Abstract

Phosphate-decorated g-C3N4 photocatalysts with enhanced photo-induced charge separation in visible light region and sun light-driven photocatalytic performance were prepared by a facile pore impregnation approach. The photocatalysts were characterized by Brunauer–Emmett–Teller method, X-ray diffraction, scanning electron microscopy, UV–Vis diffuse reflectance spectroscopy, and surface photovoltage spectroscopy, respectively. The results show that decorating g-C3N4 by phosphate increases the adsorption of rhodamine B on the photocatalysts and the rate of photo-induced charges separation, especially the photo-induced charge separation rate in visible light region. The photocatalytic activities of g-C3N4 decorated by phosphate for decolorization of rhodamine B aqueous solution were evaluated. The result shows that when the concentration of phosphate is 4 M, g-C3N4 modified exhibits the best photocatalytic activity under simulated solar irradiation and the possible reason is discussed.

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Acknowledgments

This project was supported financially by the program of Science and Technology Department of Sichuan province (No. 2015JY0081), Students Innovation Project of Sichuan Province (No. 201410622003), the Project of Zigong city (No. 2014HX14), and the Opening Project of Key Laboratory of Green Catalysis of Sichuan Institutes of High Education (Nos. LZJ1302, LZY1101).

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Authors and Affiliations

  1. Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Pharmaceutical Engineering, Sichuan University of Science and Engineering, Zigong, 643000, People’s Republic of China

    Junbo Zhong, Jianzhang Li, Xinlu Liu, Wei Hu, Jiabo Song, Ke Liu, Tian Jin & Jie Ding

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  1. Junbo Zhong
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  2. Jianzhang Li
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  3. Xinlu Liu
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  4. Wei Hu
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  6. Ke Liu
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  7. Tian Jin
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  8. Jie Ding
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Correspondence to Junbo Zhong.

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Zhong, J., Li, J., Liu, X. et al. Enhanced photo-induced charge separation and sun light-driven photocatalytic performance of g-C3N4 modified by phosphate. Appl. Phys. A 120, 829–833 (2015). https://doi.org/10.1007/s00339-015-9347-1

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  • DOI: https://doi.org/10.1007/s00339-015-9347-1

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