▎ 摘　　要

NOVELTY - The method for preparing graphene involves (a) mixing graphite, dispersant and water, (b) grinding and dispersing the graphite slurry in a colloid mill and cooling, (c) transferring the cooled graphite slurry to a high-pressure homogenizer through a diaphragm pump and homogenizing to enable the graphite to be stripped to form uniformly distributed graphene layer, (d) continuously circulating graphene slurry in the high-pressure homogenizer, and (e) suction filtering the graphene slurry, washing with deionized water and drying in a freeze-drying machine to obtain graphene powder. USE - Method is useful for preparing graphene (claimed). ADVANTAGE - The method enables simple and economical preparation of graphene, in an environmentally-friendly manner, and is suitable for industrial mass production. DETAILED DESCRIPTION - The method for preparing graphene involves (a) mixing graphite, dispersant and water in a mass ratio of 3-150:100-5000:0-10 to obtain a graphite slurry, (b) grinding and dispersing the graphite slurry in a colloid mill and transferring the graphite slurry into a material barrel to cool the graphite slurry, (c) transferring the cooled graphite slurry to a high-pressure homogenizer through a diaphragm pump and homogenizing to enable the graphite to be stripped to form uniformly distributed graphene layer, (d) continuously circulating graphene slurry in the high-pressure homogenizer, and (e) suction filtering the graphene slurry, washing with deionized water and drying in a freeze-drying machine to obtain graphene powder with a thickness of less than 10 layers.