期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 4, 期 1, 页码 136-146出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.5b00862
关键词
N-CQDs; BiOBr; Molecular oxygen; Ionic liquid; Photocatalytic
资金
- National Natural Science Foundation of China [21206060, 21476098, 21471069]
- Jiangsu Province [1102118C]
- China Postdoctoral Science Foundation [2013T60506]
Novel nitrogen-doped carbon quantum dots (N-CQDs)/BiOBr ultrathin nanosheets photocatalysts have been prepared via reactable ionic liquid assisted solvothermal process. The one-step formation mechanism of the N-CQDs/ BiOBr ultrathin nanosheets was based on the initial formation of strong coupling between the ionic liquid and N-CQDs as well as subsequently result in tight junctions between N-CQ_Ds and BiOBr with homodisperse of N-CQDs. The photocatalytic activity of the as-prepared photocatalysts was evaluated by the degradation of different pollutants under visible light irradiation such as ciprofloxacin (CIP), rhodamine B (RhB), tetracycline hydrochloride (TC), and bisphenol A (BPA). The improved photocatalytic performance of N-CQDs/BiO Br materials was ascribed to the crucial role of N-CQDs, which worked as photocenter for light harvesting, charge separation center for separating the charge carriers, and active center for degrading the pollutants. After the modification of N-CQDs, the molecular oxygen activation ability of N-CQ_Ds/BiOBr materials was greatly enhanced. A possible photocatalytic mechanism based on experimental results was proposed.
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