▎ 摘　　要

NOVELTY - A graphene is prepared by dispersing graphene oxide in water, alcohol, phenol, and/or organic acid, performing backflow reaction under normal pressure with or without reaction medium until black matter is not separated out, stopping reaction, separating, and purifying product, wherein reaction medium is methyl silicon oil, ethanol silicon oil, or methyl phenyl silicon oil. USE - A preparation method of graphene for transistor, touch screen, genetic sequencing, fuel cell, and supercapacitor. ADVANTAGE - Graphene is green, safe, simple, and energy saving.