▎ 摘　　要

NOVELTY - Method for preparing graphene by using cathode carbon block return material, involves (a) subjecting the cathodic carbon block returning material to acid-alkali dipping treatment to obtain carbon powder, (b) mixing the carbon powder obtained in step (a), oxidant and intercalation agent to obtain intercalated graphite, (c) mixing with a solvent, and (d) carrying out microwave auxiliary peeling treatment, then carrying out microwave auxiliary peeling obtain the graphene. USE - The method is useful for preparing graphene by using cathode carbon block return material, which is useful in the technical field of solid waste treatment. ADVANTAGE - The method: can remove for preparing the graphene carbon block returning material of impurity, improving the purity of the carbon powder, so as to realize the high value utilization of the cathode carbon block return material, and the performance of graphene is excellent. DESCRIPTION OF DRAWING(S) - The drawing shows a TEM image of the graphene prepared in the preparing graphene by using cathode carbon block return material.