▎ 摘　　要

NOVELTY - Preparation of graphene comprises mixing gel material as carbon source and water to obtain hydrogel material, adding dispersing agent, and stirring; adding metal catalyst, stirring, adding oxygen gas, and stirring; and microwave heating in an inert gas atmosphere, washing with water, and drying. The dispersing agent is nano calcium carbonate, nano magnesium carbonate and/or nano barium carbonate. USE - Method for preparing graphene (claimed). ADVANTAGE - The method has small pollution on environment. The graphene has high dispersibility.