▎ 摘　　要

NOVELTY - Preparation of graphene comprises placing magnetic catalyst on substrate, attaching catalyst substrate in chemical vapor deposition device, sealing; applying magnetic field on substrate through protective gas at 50-200 standard cc/minute (sccm) for 10-30 minutes, removing oxygen; heating magnetic catalyst below Curie temperature, introducing carbon-containing gas at 100-1000 sccm, keeping for 30-300 minutes, growing graphene on substrate; stopping heating, closing carbon-containing gas, and cooling to room temperature. USE - Method for preparing graphene (claimed). ADVANTAGE - The graphene has good uniformity.