Carbon quantum dots modified BiOBr microspheres with enhanced visible light photocatalytic performance

A Review on Carbon Quantum Dot Based Semiconductor Photocatalysts for the Abatement of Refractory Pollutants

“…Liang and team illustrated that under visible light irradiation, CQDs/BiOBr photocatalysts had much greater photocatalytic activity than pure BiOBr and commercial Degussa P25 in photodegradation of RhB and antibacterial agent CIP(Ciprofloxacin). [147] Under visible light or UV irradiation, the NÀ CQDs/BiOI materials showed increased photocatalytic activity for the breakdown of RhB by the studies of Di and coworkers. [148] The photocatalytic activity of NÀ CQDs transformed atomically-thin BiOI nanosheets is attributed to the active species produced, which play a crucial impact in the photocatalysis process.…”

“…The PAu‐CQD/TiO 2 photocatalyst is found to efficiently degrade MB, erythromycin, in 20 and 150 min, respectively, under an optimised catalyst loading of 1 mg mL −1 . Liang and team illustrated that under visible light irradiation, CQDs/BiOBr photocatalysts had much greater photocatalytic activity than pure BiOBr and commercial Degussa P25 in photodegradation of RhB and antibacterial agent CIP(Ciprofloxacin) [147] . Under visible light or UV irradiation, the N−CQDs/BiOI materials showed increased photocatalytic activity for the breakdown of RhB by the studies of Di and co‐workers [148] .…”

Recent advances in photodegradation of antibiotic residues in water

“…The addition of photosensitizers is another simple method of enhancing the photoactivity of wide bandgap semiconductors in visible light. In recent years, a variety of QDs (e.g., ZnSe QDs [47] , carbon QDs (CQDs) [64] , [65] , [66] , [68] , [69] , [249] , [250] , [251] , [252] , [253] , graphene [254] , CdS [255] , [256] , Fe 3 O 4 [257] , g-C 3 N 4 [258] , CsPbBr 3 [259] and MoS 2 [260] ) have been combined into semiconductors to enhance light absorption. Among them, CQDs have become the most widely used QDs to upgrade wide-bandgap semiconductors owing to their low cost, non-toxicity, and high stability [250] , [261] .…”

PVP surfactant-modified flower-like BiOBr with tunable bandgap structure for efficient photocatalytic decontamination of pollutants

“…In comparison with MO, RhB and MB without azo bonds (-N=N-) in the molecular structure (Fig. S6) are positively charged in aqueous solutions [60,61]. In the process of MB photodegradation, the diethylamino group (C2H5)2-N-, can be effectively transformed into -NH2 by removing the ethyl group, and then oxidized to form NH4 + by photo-generated holes and hydroxyl radicals.…”