期刊
CATALYSIS SCIENCE & TECHNOLOGY
卷 10, 期 20, 页码 6800-6808出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0cy01124j
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资金
- National Natural Science Foundation of China [51679084]
- Natural Science Foundation of Hunan Province [2020JJ4187]
- National Innovative Talent Promotion Program of China [2017RA2088]
- Funds for Innovative Province Construction of Hunan Province of China [2019RS3012]
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-C(3)N(4)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-C(3)N(4)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.
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