▎ 摘　　要

NOVELTY - Preparation of sandwich structure nitrogen-doped zinc oxide coated nitrogen-doped graphene composite material, involves (1) mixing the graphene oxide dispersion with aniline, then adding a small amount of ammonium persulfate aqueous solution, stirring, and then continuing to add zinc acetate dihydrate aqueous solution under stirring conditions to obtain a mixed solution, (2) subjecting the mixed solution to a hydrothermal reaction to obtain an intermediate product, and (3) after filtering and drying the intermediate product, calcining under the protection of nitrogen to obtain the final product. USE - Preparation of sandwich structure nitrogen-doped zinc oxide coated nitrogen-doped graphene composite material used as photocatalytic material (all claimed). ADVANTAGE - The preparation is simple and economical, provides composite material with visible light response ability, abundant active reaction points, and excellent photogenerated electron transmission property and catalytic activity.