▎ 摘　　要

NOVELTY - Method for preparing boron nitride nanostructure-graphene composite material with controllable morphology, involves (a) adding nano boron powder, chelating agent and cobalt salt to deionization sequentially, stirring, filtering, and vacuum drying to obtain a boron-cobalt precursor, where the chelating agent is sodium citrate or sodium tartrate, adding the graphene to transition metal nitrate solution, stirring, ultrasonically processing, filtering, and vacuum drying to obtain nitrate-graphene powder, where the transition metal nitrate is cobalt nitrate, iron nitrate or nickel nitrate, and the concentration of nitrate aqueous solution is 0.001-0.1 mol/l, and (b) placing the boron-cobalt precursor and nitrate-graphene powder on the bottom and upper part of the crucible respectively, placing the crucible in a vacuum tube furnace, and heating up to a certain temperature in an ammonia atmosphere for heat treatment reaction, and naturally cooling to room temperature. USE - The method is used for preparing boron nitride nanostructure-graphene composite material with controllable morphology (claimed). ADVANTAGE - The boron nitride nanostructures prepared are stable in structure. DETAILED DESCRIPTION - Method for preparing boron nitride nanostructure-graphene composite material with controllable morphology, involves (a) adding nano boron powder, chelating agent and cobalt salt to deionization sequentially, stirring, filtering, and vacuum drying to obtain a boron-cobalt precursor, where the chelating agent is sodium citrate or sodium tartrate, adding the graphene to the transition metal nitrate solution, stirring, ultrasonically processing, filtering, and vacuum drying to obtain nitrate-graphene powder, where the transition metal nitrate is cobalt nitrate, iron nitrate or nickel nitrate, and the concentration of nitrate aqueous solution is 0.001-0.1 mol/l, and (b) placing the boron-cobalt precursor and nitrate-graphene powder on the bottom and upper part of the crucible respectively, placing the crucible in a vacuum tube furnace, and heating up to a certain temperature in an ammonia atmosphere for heat treatment reaction, and naturally cooling to room temperature to obtain a boron nitride nanostructure-graphene composite material with controllable morphology, where the boron nitride nanostructures are boron nitride nanotubes or boron nitride nanosheets, and the heat treatment reaction temperature is carried out at 1380-1580 degrees C for 1-5 hours.