Preparation and Photocatalytic Properties of CNTs/rGO-CuO Composite Powder

Carbon nanotubes and reduced graphene oxides with CuO (CNTs/rGO-CuO) composite powder was synthesized by spray drying and post-calcinating method, and the phase and morphology were analyzed. The synthesis conditions that had a significant effect on the morphology and photocatalytic performance of composite powder such as decomposed temperature, carbon nanotubes (CNTs) to graphene oxides (GO) mass ratio, CNTs and GO mass fraction were discussed. The preparation process was optimized. The results show that when the decomposed temperature was 210℃, CNTs to GO mass ratio was 1:1, CNTs and GO mass fraction was 10%, the composite powder had the best property. CNTs and rGO formed a spherical structure and CuO particles were uniformly distributed on the surface of the spherical structure. 98.3% degradation of methyl orange (MO) could be obtained after 20 min under visible light.