▎ 摘　　要

NOVELTY - Method for preparing graphene, involves sequentially adding graphene oxide, photocatalyst and hole-trapping agent to deionized water, uniformly dispersing by ultrasound, subjecting the obtained mixed solution to illumination reduction reaction under visible light, washing the product and freeze-drying. USE - The method is useful for preparing graphene used for micro-nano processing application. ADVANTAGE - The graphene sheet is uniform and continuous, and has high degree of reduction and electrical conductivity.