▎ 摘　　要

The preparation of a magnetic core-shell Z-scheme heterojunction Fe3O4@SiO2@TiO2-Ce/rGO composite material by sol-gel and hydrothermal methods is described. The catalytic activity of the composite photocatalyst doped with metal Ce and loaded with graphene is significantly improved. Under standard experimental conditions (pH = 7, [methylene blue] = 10 mg L-1, magnetic composite photocatalyst concentration = 0.1 g 50 mL(-1)), the Fe3O4@SiO2@TiO2-Ce/rGO composite photocatalyst lead to a maximum degradation of methylene blue of 98.2% in 120 min.