Preparation of microspherical Co3O4/BiOBr photocatalytic materials and efficient removal of RhB dye under visible light
To improve the visible light utilization of bismuth semiconductor BiOX(X=Cl,Br)photocatalysts,Co3O4/BiOBr heterojunction composites were prepared by hydrothermal method and characterized morphologically by XRD,FT-IR,SEM,XPS,SEM,XPS,UV-vis DRS,and EPR were used for analyzing the crystal structure,morphology,elemental states,and light absorption properties.Meanwhile,the rhodamine B(RhB)dye degradation by Co3O4/BiOBr under visible light was investigated.The results show that the combination of Co3O4 and BiOBr can expand the light absorption range,and the microspherical Co3O4 can greatly increase the specific surface area of the Co3O4/BiOBr heterojunction.Multiple orthogonal experiments showed that the degradation efficiencies of Co3O4/BiOBr for rhodamine B(RhB)dye were 1.89 and 45.45 times higher than those of BiOBr and Co3O4,respectively,when the substance amount ratio of Co3O4 to BiOBr was 1:10.RhB dye could be completely degraded within 30 min.The photocatalytic efficiency of the catalyst remained above 83％after 5 cycles.The study demonstrated that the catalyst has potential application in the photocatalytic degradation of organic pollutants.Translated with DeepL.com(free version).
bismuth bromidecobalt tetroxidephotocatalysiswastewater purificationrhodamine B
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