Issue 2, 2021

Graphitic carbon nitride nanosheets with low ON1-doping content as efficient photocatalysts for organic pollutant degradation

Abstract

Oxygen-doped (O-doped) graphitic carbon nitride (g-C3N4) usually presents excellent photocatalytic activity compared to pristine g-C3N4 with the common ON2-doping. However, there are very few research studies concerned with the ON1-doped g-C3N4. Herein, g-C3N4 nanosheet samples with two different O-doping positions (ON1 and ON2) were prepared and characterized. Different ON1-doping contents were achieved via the polycondensation of g-C3N4 under different calcination temperatures for the precursor urea. Results showed that the as-prepared ON1-doped g-C3N4 nanosheets with an oxygen content of 2.16% demonstrated the highest photocatalytic activity in degrading rhodamine B (RhB, 10 mg L−1) with a degradation rate as high as 99% in 3 min under visible light irradiation, which is the best g-C3N4 photocatalyst compared to the literature reports for RhB degradation. The improved degradation was related to the decreased oxygen content of ON1-doped g-C3N4 nanosheets instead of normal ON2-doping, which was also confirmed by DFT computation.

Graphical abstract: Graphitic carbon nitride nanosheets with low ON1-doping content as efficient photocatalysts for organic pollutant degradation

Supplementary files

Article information

Article type
Paper
Submitted
02 12月 2020
Accepted
04 1月 2021
First published
05 1月 2021

Environ. Sci.: Nano, 2021,8, 460-469

Graphitic carbon nitride nanosheets with low ON1-doping content as efficient photocatalysts for organic pollutant degradation

Y. Huang, L. Ning, Z. Feng, G. Ma, S. Yang, Y. Su, Y. Hong, H. Wang, L. Peng and J. Li, Environ. Sci.: Nano, 2021, 8, 460 DOI: 10.1039/D0EN01198C

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