▎ 摘　　要

NOVELTY - Preparing reduced graphene, comprises: (i) preparing graphene oxide aqueous solution, and testing its pH value; (ii) adjusting the pH value of graphene oxide aqueous solution to less than 5; and (iii) irradiating the prepared graphene oxide aqueous solution using an UV analyzer until the reduction reaction is complete. USE - The method is useful for preparing reduced graphene (claimed). ADVANTAGE - The method: has simple preparation process, short reaction time and high efficiency; does not introduce toxic and corrosion reducing agents; does not require heating; and is environmentally friendly and economical.