Efficient visible light photocatalytic activity based on magnetic graphene oxide decorated ZnO/ZrO2

In the present study, ZnO/ZrO2/MGO nanocomposite were successfully prepared by an hydrothermal process. The obtained sample were characterized by X-ray powderdiffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), Raman spectroscopy, PL spectrum. The observation of diffuse reflectance spoctroscopy (DRS) showed that the energy gap of ZnO/ZrO2 nanoparticles were supported on Graphene oxide, are lower than that of ZrO2. The results show that, the addition of ZrO2 to ZnO decreased the electron-hole recombination and increased the rate of radicals formation [1,2]. The photocatalytic activity of all samples is evaluated by degradation of RhB under visible light irradiation [3]. The nanocomposite ZnZrMGO exhibited the superior activity relative to the pure nanoparticles. In addition, influence of pH, quantity of catalyst, dosage of ZrO2 and ZnO on the degradation activity was investigated in detail and the results were discussed.