MoS2/BiVO4纳米复合材料的制备及可见光光催化性能研究

In this paper in order to make full use of the solar light resource, the absorption spectrum range of the catalyst material is required in the visible light range, so the new photocatalyst is prepared by using the narrow band gap semiconductor material. Both MoS2 and BiVO4 are narrow band gaps, and the absorption spectrum is narrow. The MoS2/BiVO4 microspheres composites were synthesized by hydrothermal method using sodium molybdate, thiourea, citric acid, bismuth nitrate and ammonium metavanadate as reactants. Meanwhile methylene blue was taken as the probe molecular to evaluate the visible light photocatalytic activity of MoS2/BiVO4 composites. The samples were characterized by X-ray diffraction(XRD)、scanning elecctron microscopy(SEM)、energy-dispersive X-ray analysis(EDS) and UV-visible spectroscopy(UV-vis). The results of test show that the composites we prepared were MoS2/BiVO4 microspheres and its morphology changes. Experimental results show that compared with pure MoS2, the composites exhibited good catalytic degradation effect on the methlyene blue under visible light. And with the increase of the amount of BiVO4, the degradation ability of the composites increased gradually, and the photocatalytic degradation ability of MBV5 sample was the highest, the catalytic degradation can reach 71% after irradiation for 120 minutes. The research shows that the MoS2/BiVO4 composites can achieve high efficiency degradation of pollutants, and show excellent photocatalytic performance.