▎ 摘　　要

NOVELTY - Preparing core-shell structure of graphene-manganese oxide nano complex material comprises: (i) taking manganese acetate tetrahydrate, adding deionized water and dissolving to obtain solution A; (ii) taking graphene oxide, treating under ultrasound for half an hour to obtain solution B; (iii) mixing solution A and solution B, placing under water bath, heating, adding ethanol dropwise, adding ammonium hydroxide dropwise, heating to obtain solution C; (iv) cooling and transferring into hydrothermal reaction tank, heating; (v) filtering, washing, drying under vacuum to obtain the catalyst. USE - The method is useful for preparing core-shell structure of graphene-manganese oxide nano complex material (claimed). ADVANTAGE - The method is simple, economical and produces high purity product. DETAILED DESCRIPTION - Preparing core-shell structure of graphene-manganese oxide nano complex material comprises: (i) taking 2-4 g manganese acetate tetrahydrate in 25 ml beaker, adding 8-15 ml deionized water and dissolving to obtain solution A; (ii) taking 20-30 ml graphene oxide (4.6 g/l) in100 ml beaker, treating under ultrasound for half an hour to obtain solution B; (iii) mixing solution A and solution B in three flask, placing in 45 degrees C water bath, heating, adding 40-60 ml ethanol dropwise for 10 minutes, adding 10-20 ml ammonium hydroxide dropwise for 10 minutes, heating at 80-10 degrees C for 2-4 hours to obtain solution C; (iv) cooling to room temperature and transferring into 100 ml hydrothermal reaction tank, heating in muffle furnace at 160-190 degrees C for 10-16 hours; (v) filtering the hydrothermal reaction samples many times, washing, drying under vacuum to obtain the catalyst.