▎ 摘　　要

NOVELTY - Fast preparation of graphene with low layer number and small size comprises taking nano-carbon or graphene with thickness of less than 100 nm as raw material, in the presence of dispersant, dispersing in solvent to obtain predispersion liquid, spraying the pre-dispersion liquid and contacting with combustible gas, and obtaining graphene after combustion. USE - The method is for fast preparation of graphene with low layer number and small size (claimed). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for graphene, which satisfies D50 of less than 50 nm, where the single-layer graphene accounts for greater than or equal to 70%.