▎ 摘　　要

NOVELTY - Hollow graphene nanoparticle comprises graphene sheets stacked together. Each of the graphene sheets has a thickness of 1-50 nm and a planar lateral dimension of 10-100 nm. The hollow graphene nanoparticle has a particle size of 10-500 nm and a specific surface area not greater than 500 m2/g. USE - The hollow graphene nanoparticle is useful in flexible electronic materials and in transparent electrodes. ADVANTAGE - The step of heat treatment is performed by placing the hollow graphene nanoparticle in the oven filled with the protective gas, and heating up to 700-1500 degrees C so as to lead to the lattice rearrangement of the hollow graphene nanoparticle, thus reducing defect and further improving the degree of crystalline of the hollow graphene nanoparticle. The method can stably obtain the hollow graphene nanoparticle with a particle size of 10-500 nm. It is possible to avoid using toxic or dangerous chemicals, and can further obtain the advantages of a wide selection of reactants and easy fabrication. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for manufacturing hollow graphene nanoparticle, which involves forming graphene, injecting a reducing agent into an oven filled with protective gas, adding at least one of a carbon-containing gas compound or a second gas compound decomposing to generate carbon under higher temperature, and heating up to a processing temperature to perform a redox reaction so as to form nanometer graphene particles containing side products; a step of etching, immersing the nanometer graphene particles containing side products into an acidic etching solution to remove the side products and form the hollow graphene nanoparticle; and a step of heat treatment, placing the hollow graphene nanoparticle in an oven filled with protective gas, and heating up to 700-1500 degrees C to perform heat treatment so as to enhance degree of crystallinity of the hollow graphene nanoparticle, where the hollow graphene nanoparticle is made of graphene sheets stacked together.