▎ 摘　　要

NOVELTY - Preparing graphene with controllable layers involves obtaining molten metal, regulating the temperature field of the molten metal, passing carbon-containing gas into the bottom of the molten metal in the form of bubbles. The travel path of the bubbles in the molten metal is adjusted to adjust the number of precipitation layers of graphene. USE - Method for preparing graphene with controllable layers. ADVANTAGE - The carbon-containing gas is introduced into the bottom of the molten metal in the form of bubbles. The path of the bubbles in the molten metal is regulated, and number of graphene precipitation layers can be adjusted, which can provide the existing technology to effectively control the number of graphene layers, and has important application prospects.