Photodegradation of Microcystine-LR Uising BiOBr under UV and Visible Light Irradiation

Abstract:

BiOBr photocatalyst was prepared by cetyl pyridine bromide (CPB). The characterization of BiOBr was measured by DRS UV-Vis, XRD, BET, TEM/HRTEM, XPS and IR. The energy gap of BiOBr was merely 2.62eV which can absorb visible light (λ473nm), BiOBr was identified to the tetragonal phase exhibits significantly enhanced structural properties and the ration of the amount of Bi and Br on the surface of BiOBr is 1. The BET of BiOBr was 12.03 m²/g and was layered structure. Compared with traditional catalyst TiO₂(P25), the prepared BiOBr has good visible light activity and can degradated Microcystine-LR(MC-LR) under UV and Visible light irradation. The degradation time of MC-LR between UV and vis-light irradiation is respectively 60min and 150min under the same condition. It was indicated that the oxidizing rate of O₂^- in UV system is obviously higher than that of·OH in the vis-light system by ESR experiments, which is also proved in the differences of reaction intermediates in the degradation process under the two lamps.

• Periodical: Applied Mechanics and Materials (Volumes 488-489)
• Pages: 248-251
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.488-489.248
• Online since: January 2014
• Authors: Yan Fen Fang, Xin Yu Li, Man Ke Jia, Ying Ping Huang*
• Keywords: Biobr, Microcystine, Synthesize, Visible Light

References

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