▎ 摘　　要

NOVELTY - Preparing graphene comprises reducing graphene oxide using iron powder and hydrochloric acid complex reduction system, where the graphene is in powder form. USE - The method is useful for preparing graphene (claimed). ADVANTAGE - The method: is capable of simply and economically preparing the graphene without toxic raw material, in an eco-friendly manner; is good for batch production; and has large-scale industrial application.