p-n结型光催化剂Co3O4/In2O3的制备、表征及其光催化性能的研究

In this paper, the p-n junction photocatalyst Co3O4/In2O3 was prepared by coprecipitation method and it was characterized by X-ray powder diffraction (XRD). The photocatalytic activity of the photocatalyst Co3O4/In2O3 was evaluated by photocatalytic reduction of Cr2O7(superscript 2-) and photocatalytic oxidation of Methyl Orange. The effect of the doped amount of Co3O4, different calcination temperatures and different calcination time on the photocatalytic activity of Co3O4/In2O3 was investigated, respectively. The results showed that the optimum amount of doped Co3O4 was 5 wt. %. The optimum calcination temperature and the optimum calcination time were 300℃ and 2h, respectively. The photocatalytic reduction activity and photocatalytic oxidation activity of the p-n junction photocatalyst Co3O4/In2O3 were much higher than that of the pure In2O3 under visible and UV light irradiation. The possible mechanisms of influence on the photocatalytic activity of the p-n junction photocatalyst Co3O4/In2O3 were also discussed.