Enhanced visible-light photocatalytic activity of ZnS/BiOBr/graphene oxide ternary composite

In this paper, a facile and highly efficient ternary composite ZnS/BiOBr/Graphene oxide (ZnS/BiOBr/GO) with zinc vacancies was successfully synthesized by solvothermal method. The photocatalysts showed an efficient photocatalytic performance for organic pollutant under visible light irradiation. The photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), UV-visible diffuse reflectance spectrophotometer (DRS), and photoluminescence spectroscopy (PL). The experimental results indicated that the 100 mg ZnS and 6 mg GO co-doped BiOBr (100ZBG-6) shows the highest photocatalytic activity, achieving 86.6% degradation efficiency for Rhodamine B (RhB) under visible light irradiation, which was 28.7 and 6.1 times than that of pure ZnS and BiOBr. It is indicated that the ZnS/BiOBr/GO composite has the great potential application in the degradation organic pollutant. This article describes the enhancement of light absorption and photocatalytic activity by synthesizing zinc vacancies of ZnS and introducing GO modified BiOBr.