Synthesis of BiOBr@Bi2MoO6photocatalyst with excellent visible light photocatalytic removal of RhB and BPA
YANG Jia1,2,3, NIU Xiao-jun1,2,3, CHEN Wei-yi1,2,3, AN Shao-rong1,2,3
1. School of Environment and Energy, South China University of Technology, Guangzhou 510006, China;
2. The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou 510006, China;
3. Cuangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, China
BiOBr@Bi2MoO6 photocatalyst was synthesized by a two-step solvothermal method, and characterized by XRD, SEM, XPS, PL and UV-vis DRS. The photocatalytic performance was evaluated by the degradation of Rhodamine B and bisphenol A (BPA) under visible light irradiation. As a result, the BiOBr@Bi2MoO6 heterojunction exhibited higher photocatalytic activity than that of pure Bi2MoO6. The optimal composite with 20% BiOBr content showed the highest photocatalytic activity, the photodegradation rate was 97.51% and 95.41% over RhB and BPA, respectively. By the detection of active species, demonstrated that h+ and·O2- played the crucial roles in photodegradation of pollutants. The possible mechanism of the enhanced photocatalytic performance of the BiOBr@Bi2MoO6 heterojunctions was discussed. The result indicated that the formation of heterostructure between BiOBr and Bi2MoO6 was the main effect factor with enhanced photocatalytic activity. Besides, BiOBr@Bi2MoO6-20heterostructure showed excellent stability and reusability in the visible light photochemical applications.
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