▎ 摘　　要

NOVELTY - Preparation of graphene using limestone comprises taking 12 g calcium carbonate and 20 g lithium carbonate, grinding, mixing uniformly, adding in crucible, assembling electrode lead and covering mouth with crucible curse asbestos network, feeding in muffle furnace at 750 degrees C carrying out electrolysis reaction for 5 hours, removing crucible, naturally cooling to room temperature, dissolving in 6 mol/L hydrochloric acid, centrifuging, washing upper clear liquid until neutral, and blast drying at 60 degrees C. USE - Method for preparing graphene using limestone. ADVANTAGE - The environment-friendly method is simple. It has low equipment requirement, wide raw material sources at low price, and good application prospect.