▎ 摘　　要

A facile approach to prepare Cu-reduced graphene oxide (Cu-RGO) catalyst was developed via a one-step hydrothermal process. The suggested method enables simultaneously the deposition of Cu nanoparticles on RGO surfaces and reduction of graphene oxide. The degradation of methylene blue aqueous solution catalyzed by Cu-RGO was investigated. The results indicated that, in the presence of 11202, the Cu-RGO catalyst with graphene oxide/Cu mass ratio of 3:17 showed the highest degradation rate of 99.5% in 4 h. A degradation rate of 98.1% can be maintained after reusing for six times, showing high catalytic activity and excellent stability.