Journal
DALTON TRANSACTIONS
Volume 49, Issue 24, Pages 8041-8050Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0dt00299b
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Funding
- National Natural Science Foundation of China [21401062]
- Natural Science Fund of Jiangsu Province [BK20161294]
- Scientific and Technological Program of Lianyungang [SH1503, JC1603]
- Qing Lan Project of Jiangsu Province
- Natural Science Foundation of Jiangsu Province Department of Education [15KJD150007, 17KJA430003]
- First-class Undergraduate Majors Construction Program of Jiangsu Province
- Key Discipline Construction Program of Jiangsu Province
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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Nonmetal doping is a convenient method to adjust the visible light photocatalytic activity of graphitic carbon nitride (g-C3N4). Herein, highly active sulfur-doped porous g-C3N4(C3N4-S) was successfully prepared by one-step calcination using thiourea and melamine as the precursors. C3N4-S exhibited excellent photocatalytic performance for the degradation of Rhodamine B (RhB) under visible light irradiation. C3N4-S not only promoted the separation of photogenerated electron-hole pairs, but also enhanced electron transfer, resulting in a great improvement in the photocatalytic efficiency. Based on capture experiments and DMPO spin-trapping ESR spectra, the superoxide radical (O-center dot(2)-) was proved to be the predominant active species and the possible photocatalytic mechanism of C3N4-S was proposed. The photocatalytic mechanism of RhB degradation over C3N4-S was further explored using high-resolution mass spectra (HRMS).
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