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Issue 20, 2020
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Nitrogen deficient carbon nitride for efficient visible light driven tetracycline degradation: a combination of experimental and DFT studies

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Abstract

The narrow visible-light absorption range and a high recombination rate of photo-excited electrons and holes are the main reasons for the confined photocatalytic performance of graphitic carbon nitride (g-C3N4). Here, g-C3N4 samples with nitrogen vacancies were synthesized with a very basic thermal polymerization method, and the resultant nitrogen deficient g-C3N4 (g-C3N4-1.0) prepared by adding 1 g NaOH exhibited better activity than original g-C3N4 for tetracycline degradation, because of a lower recombination rate of photo-excited charge carriers and a redshift of the light absorption range. The advances were confirmed by experiments and spin-polarized density functional theory (DFT), which corroborated each other and showed the effect of defect sites on g-C3N4-1.0 by investigating the electronic structure evolution of the system. The sample can be used for tetracycline degradation, and the spin-polarized DFT study helps understand the reaction mechanism.

Graphical abstract: Nitrogen deficient carbon nitride for efficient visible light driven tetracycline degradation: a combination of experimental and DFT studies

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Article information


Submitted
03 Jun 2020
Accepted
07 Aug 2020
First published
07 Aug 2020

Catal. Sci. Technol., 2020,10, 6800-6808
Article type
Paper

Nitrogen deficient carbon nitride for efficient visible light driven tetracycline degradation: a combination of experimental and DFT studies

M. Wang, C. Fan, S. Yang, M. Liu, J. Luo, Y. Liu, L. Tang, Z. Gong and S. Leng, Catal. Sci. Technol., 2020, 10, 6800
DOI: 10.1039/D0CY01124J

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