▎ 摘　　要

NOVELTY - Nitrogen-doped graphene/manganese dioxide composite material is claimed. The manganese dioxide on the nitrogen-doped graphene sheet layer is linear manganese dioxide having a diameter of 10-20 nm. USE - Used as nitrogen-doped graphene/manganese dioxide composite material. ADVANTAGE - The material has excellent catalytic activity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparation of nitrogen-doped graphene/manganese dioxide composite material comprising (i) mixing manganese source compound solution and graphene oxide solution to obtain first mixed solution, manganese source compound is manganese acetate hydrate, and (ii) adding ammonium persulfate into first mixed solution obtained in step (i) and carrying out hydrothermal reaction at 80-200 degrees C for 1-36 hours to obtain final product.