Journal
CHEMICAL ENGINEERING JOURNAL
Volume 366, Issue -, Pages 468-479Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2019.02.088
Keywords
Bi2O2CO3; g-C3N4; Antibiotics; Photodegradation; First principle calculation
Categories
Funding
- National Natural Science Foundation of China [21601141, 21671153]
- Department of Education of Hubei Province under the project of Science and Technology Innovation Team of Outstanding Young and Middle-aged Scientists [T201606]
- Wuhan Institute of Technology Youth Fund [18QD33]
- Open Research Fund of State Key Laboratory of Inorganic Synthesis and Preparative Chemistry (Jilin University) [2017-02]
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To overcome the issue of UV-light response character of Bi2O2CO3 due to its wide band gap, we primarily attempted to understand the possibility of improving the photocatalytic activity of Bi2O2CO3 via g-C3N4 surface-decoration by the theoretical calculation. Subsequently, g-C3N4 surface-decorated Bi2O2CO3 was successfully prepared via a facile hydrothermal method. It was found that the g-C3N4 surface-decorated Bi2O2CO3 samples exhibited enhanced activities for the photodegradation of tetracycline compared with pure Bi2O2CO3 upon simulated solar light irradiation. Among them, the 10 wt% g-C3N4 surface-decorated Bi2O2CO3 sample showed the highest photocatalytic efficiency. First principle calculation and experimental data confirmed that the charge transfer at the interface between g-C3N4 and Bi2O2CO3 could significantly suppress the recombination of photogenerated electron-holes pairs, thus improving the photocatalytic performance. The proposed mechanism for the enhanced photocatalytic activity was also discussed. Moreover, the photodegradation of antibiotics over g-C3N4 surface-decorated Bi2O2CO3 was also performed in actual water matrix.
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