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Photocatalytic oxidation removal of fluoride ion in wastewater by g-C3N4/TiO2 under simulated visible light

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Abstract

As a highly active photocatalyst, g-C3N4/TiO2 heterojunction nanocomposites were in situ synthesized by hydro-thermal method and calcination using melamine as precursors. The morphology and chemical structure of the prepared photocatalysts were characterized by X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), SEM, UV-vis, and photoluminescence analysis (PLA). At last, the photocatalytic activities of g-C3N4/TiO2 nanocomposites to remove fluoride under simulated visible light were evaluated. Results showed that the fluoride removal rate of the prepared g-C3N4/TiO2 was about three times than pure g-C3N4 due to the rapid charge transfer and the efficient separation of photogenerated electron-hole pairs in heterojunctions between g-C3N4 and TiO2.

Graphical abstract

Heterojunction g-C3N4/TiO2 display the excellent fluoride removal rate due to the rapid charge transfer and efficient separation of electron-hole pairs.

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Funding

We received the supports from the Special fund of Shaanxi Provincial Education Department (16JK1612), the Open Project of Zhenjiang Key Laboratory of Marine Functional Thin Film Materials High Technology Research (ZHZ2019008), Key Research and Development Project of Shaanxi Province (2017GY-180), and Provincial College Students Innovation and Entrepreneurship Program (201819018).

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Xi’an Shi’you University, Xi’an, 710065, Shaanxi, China

    Chunling Lin, Boyang Liu, Mulan Chang, Xin Li, Xingyu Lu & Rong Chen

  2. School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, Jiangsu, China

    Liuyue Pu & Jiaoxia Zhang

  3. Research Center, Chuanqing Drilling Company of CCDC, Xi’an, 710021, Shaanxi, China

    Yan Sun

  4. Road Environment Science and Technology CO., LTD, Wuhan, 430000, China

    Yanli Xue

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  1. Chunling Lin
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  2. Boyang Liu
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Lin, C., Liu, B., Pu, L. et al. Photocatalytic oxidation removal of fluoride ion in wastewater by g-C3N4/TiO2 under simulated visible light. Adv Compos Hybrid Mater 4, 339–349 (2021). https://doi.org/10.1007/s42114-021-00228-x

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