▎ 摘　　要

NOVELTY - A hollow graphene capsule is formed by graphene-based nanosheet self-curling of hollow closed structure, where the closed structure has reversibility. The thickness of the hollow graphene capsule is the same as the thickness of the graphene-based nanosheet. The hollow graphene capsule has grain diameter 30-90 nm. USE - As hollow graphene capsule. ADVANTAGE - The hollow graphene capsule is a graphene-based nanomaterial with new structure obtained by regulating the concentration of graphene-based nanosheets in water. The hollow graphene capsule has structure control base. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for solvent inducing self-curling method of preparing hollow capsule graphene, which involves: (1) dispersing graphene-based nano-sheet into deionized water, ultrasonically processing, to form uniformly dispersed graphene-based nano-dispersion liquid; (2) adding non-polar solvent into graphene-based nano dispersion liquid to obtain the self-curling hollow graphene.