Journal
ADVANCED COMPOSITES AND HYBRID MATERIALS
Volume 4, Issue 2, Pages 339-349Publisher
SPRINGERNATURE
DOI: 10.1007/s42114-021-00228-x
Keywords
Wastewater treatment; Fluoride ion; Photocatalytic oxidation; Heterojunction nanocomposites
Funding
- Special fund of Shaanxi Provincial Education Department [16JK1612]
- 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]
- Provincial College Students Innovation and Entrepreneurship Program [201819018]
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The highly active g-C3N4/TiO2 heterojunction nanocomposites were successfully synthesized using a hydro-thermal method and calcination, showing a significantly higher photocatalytic activity compared to pure g-C3N4. Characterization and photocatalytic activity tests revealed that the heterojunction played a key role in the efficient separation of photogenerated electron-hole pairs and rapid charge transfer.
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.
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