▎ 摘　　要

NOVELTY - Activated graphene-metal oxide composite photocatalyst comprises activated graphene and a metal oxide complexed on the activated graphene. USE - The photocatalyst is useful for photocatalytic reduction of heavy metal ions (claimed). ADVANTAGE - The method is simple and suitable for industrial production. The photocatalyst has large surface area and high adsorption performance, is non-toxic, does not cause secondary pollution, and can be recycled. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the activated graphene-metal oxide composite photocatalyst, comprising mixing the activated graphene and metal nitrate solution to obtain a mixed solution, performing vacuum impregnation of the mixed solution to obtain an intermediate product, and subjecting the intermediate product to microwave treatment; and (2) photocatalytic reduction of heavy metal ions, comprising performing photocatalytic reduction reaction of heavy metal ion containing solution in presence of activated graphene-metal oxide composite photocatalyst to obtain reduced product.