Abstract
The porous platelet-shaped α-Bi2O3 photocatalyst was successfully synthesized by a novel hydrothermal–calcination method assisted with ethylenediamine and polyvinylpyrrolidone. The physical and chemical properties of α-Bi2O3 photocatalyst were characterized based on XRD, XPS, SEM, TEM, EDS, UV–Vis DRS, and PL techniques. The influence of preparation conditions on the formation of α-Bi2O3 photocatalyst was investigated, and the effect of catalyst dosage and pH value on the EE2 removal rate was also investigated. The synthesized porous platelet-shaped α-Bi2O3 photocatalyst exhibited excellent photocatalytic activity for 17α-ethynylestradiol (EE2), and 97.8% of EE2 was removed after 75 min of visible light irradiation using α-Bi2O3 as photocatalyst. The reaction rate constant over the porous platelet-shaped α-Bi2O3 photocatalyst was 11.6 and 11.4 times of that of traditional α-Bi2O3 and N-TiO2, respectively. The possible photocatalytic mechanism has been discussed on the basis of the theoretical calculation and the experimental results. The porous platelet-shaped α-Bi2O3 was a stable and efficient photocatalyst, proving that it is a promising photocatalyst.
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This work was jointly supported by National Natural Science Foundation of China (Nos. 21163023 and 21261026) and Key Program of Yunnan Province Foundation (No. 2013FA005).
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Shi, Y., Luo, L., Zhang, Y. et al. Synthesis and characterization of porous platelet-shaped α-Bi2O3 with enhanced photocatalytic activity for 17α-ethynylestradiol. J Mater Sci 53, 1049–1064 (2018). https://doi.org/10.1007/s10853-017-1553-0
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DOI: https://doi.org/10.1007/s10853-017-1553-0