Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 36, Pages 20111-20123Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b05268
Keywords
CQDs; BiOCl; ultrathin nanosheets; photocatalytic mechanism
Funding
- National Nature Science Foundation of China [21206060, 21476098, 21471069]
- Jiangsu Province [1102118C]
- China Postdoctoral Science Foundation [2013T60506]
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In this paper, carbon quantum dots (CQDs) modified BiOCl ultrathin nanosheets photocatalyst was synthesized via a facile solvothermal method. The structures, morphologies, optical properties, and photocatalytic properties were investigated in detail. The photo catalytic activity of the obtained CQDs modified BiOCl ultrathin nanosheets photocatalyst was evaluated by the degradation of bisphenol A (BPA) and rhodamine B (RhB) under ultraviolet, visible, and nearinfrared light irradiation. The CQDs/BiOCl materials exhibited significantly enhanced photocatalytic performance as compared with pure BiOCl and the S wt % CQDs/BiOCl materials displayed the best performance, which showed a broad spectrum of photocatalytic degradation activity. The main active species were determined to be hole and O-2(center dot-) under visible light irradiation by electron spin resonance (ESR) analysis, XPS valence spectra, and free radicals trapping experiments. The crucial role of CQDs for the improved photocatalytic activity was mainly attributed to the superior electron transfer ability, enhanced light harvesting, and boosted catalytic active sites.
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