▎ 摘　　要

NOVELTY - The method comprises mixing graphene oxide with an alkali metal or alkaline earth metal as a reducing agent and iodine as an initiator and then ultrasonically stirring, reducing graphene oxide into graphene, and separating graphene and then purifying. USE - The method is useful for reducing graphene oxide into graphene (claimed). ADVANTAGE - The method is capable of efficiently, rapidly, simply and economically reducing graphene oxide into graphene with high quality in an environmentally friendly manner. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing garaphene.