▎ 摘　　要

NOVELTY - Preparing ZIF-67/graphene oxide and pyrolysis to prepare hollow cobalt oxide/graphene composite material comprises (i) dissolving cobalt salt in aqueous graphene oxide solution and dispersing by ultrasound to obtain ultrasonic dispersion, (ii) pouring ultrasonic dispersion into aqueous solution of dimethylimidazol, stirring well and allowing to stand, centrifuging, washing and drying to obtain ZIF-67/graphene oxide composite material, and (iii) subjecting ZIF-67/graphene oxide composite material to pyrolysis treatment. USE - The method is useful for preparing ZIF-67/graphene oxide and pyrolysis to prepare hollow cobalt oxide/graphene composite material. ADVANTAGE - The method is simple, economical, easy control of reaction process and suitable for industrial large-scale production.