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以硝酸铜和改进的Hummers法制备的氧化石墨烯为原料,原位生长制备CuO/石墨烯。采用SEM、XRD手段对其进行表征,并在紫外光照射和外加电场条件下考察了对亚甲基蓝的催化降解效果。实验结果表明,石墨烯的加入,增强了催化剂的吸附性和导电性,外加电场的施加,使得电极-催化剂颗粒-电极之间形成三电极体系,大幅提升了CuO的催化效率。与纯的CuO相比,CuO/石墨烯对亚甲基蓝的光催化降解率从33.23%提高到91.77%,对亚甲基蓝的光电催化降解率达93.16%。
CuO / graphene was grown in situ by using cupric oxide and modified graphene oxide as raw materials. The catalysts were characterized by SEM and XRD, and the catalytic degradation of methylene blue was investigated under UV irradiation and electric field. The experimental results show that the addition of graphene enhances the adsorption and conductivity of the catalyst. The application of an external electric field results in the formation of a three-electrode system between the electrode-catalyst particles and the electrode, thereby greatly improving the catalytic efficiency of CuO. Compared with the pure CuO, the photocatalytic degradation rate of methylene blue by CuO / graphene increased from 33.23% to 91.77%, and the photoelectrocatalytic degradation rate of methylene blue reached 93.16%.