▎ 摘　　要

NOVELTY - The preparation method of graphene nano-roll, involves dispersing mixed powder of MXene material and graphene in water to form dispersion liquid, and heating, where the concentration of dispersion liquid is 0.1-1 mg/mL, and freeze-drying the heated dispersion liquid using liquid nitrogen. USE - Preparation of graphene nano-roll used in medicine, photoelectric sensor, catalyst and energy storage applications. ADVANTAGE - The method utilizes MXene material and graphene dispersed in water to generate electrostatic repulsion, thereby improving the hydrophilicity of graphene without introducing additives and without complex reaction with organic macromolecules, and at the same time preserving the integrity of graphene. The lamellar structure ensures electrical conductivity, and through liquid nitrogen cooling into rolls, based on retaining the complete structure of graphene, the contact points between the sheets are reduced, so that the specific surface area of the sheets is higher, and the problem of sheet stacking is solved.