Abstract
g-C3N4 with porous structure has been synthesized by a thermal polymerization method and its specific surface area regulated by changing the calcination temperature. The as-prepared g-C3N4 was characterized by x-ray diffraction (XRD) analysis, Fourier-transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), x-ray photoelectron spectroscopy (XPS), and ultraviolet–visible (UV–Vis) spectrophotometer. The photocatalytic activity of g-C3N4 was investigated using Methyl Orange (MO) as target pollutant. The results show that the g-C3N4 exhibited a unique porous structure with a specific surface area reaching 142.1 m2/g at 610°C. When the calcination temperature was 570°C, the specific surface area of g-C3N4 was 116.3 m2/g and the photodegradation rate of MO was 65%. Moreover, g-C3N4 retained good photocatalytic stability after being used for five times. The photocatalytic mechanism was also explored by free-radical scavenging experiments.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (21862004), Natural Science Foundation of Guangxi Province (2018GXNSFAA281230, 2017GXNSFBA198059), Middle-aged and Young Teachers’ Basic Ability Promotion Project of Guangxi (2017KY0407), and BAGUI Scholar Program of Guangxi Province of China. This financial support is gratefully appreciated.
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Yang, J., Zhang, X., Xie, C. et al. Preparation of g-C3N4 with High Specific Surface Area and Photocatalytic Stability. J. Electron. Mater. 50, 1067–1074 (2021). https://doi.org/10.1007/s11664-020-08654-1
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DOI: https://doi.org/10.1007/s11664-020-08654-1