Abstract
In this paper, bismuth oxybromide (BiOBr) photocatalysts were synthesized in the presence of tetrabutylammonium bromide (TBAB) at the different volume fractions of ethanol/water and named as BiOBr0, BiOBr20, BiOBr50, BiOBr80 and BiOBr100, respectively. The samples were characterized and applied to the degradation of Rhodamine B (RhB) under visible-light irradiation (λ ≥ 420 nm). The results indicated that both TBAB and ethanol significantly affected the crystal phase, morphology and surface charge distribution of BiOBr. The exposed (110) faces of BiOBr with Bi3+ sites contributed to its photocatalytic activity via the enhanced separation of electrons and photogenerated holes as well as the better photo-stability. BiOBr50 showed the optimal activity for the photodegradation of RhB. Superoxide radical (O·−2) as the dominant active species was responsible for the degradation of RhB.
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Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (21677086, 21577078), Hubei Innovation Group Project (2015CFA021), The 111 Project of Hubei Province (2018-19-1), China Postdoctoral Science Foundation (2018M640721) and Master Education Fund of China Three Gorges University (2018SSPY143).
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Tang, Cc., Fang, Yf., Cao, Xq. et al. Regulation of visible-light-driven photocatalytic degradation of Rhodamine B on BiOBr via zeta potential. Res Chem Intermed 46, 509–520 (2020). https://doi.org/10.1007/s11164-019-03963-5
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DOI: https://doi.org/10.1007/s11164-019-03963-5