▎ 摘　　要

NOVELTY - Preparing graphene composite nitrogen and oxygen co-doped biomass carbon material involves dispersing biomass material in pre-cooled sodium hydroxide/urea/aqueous solution, stirring, and defoaming to obtain transparent solution I. The transparent solution I is dispered in graphene oxide solution. The organic amine is added, and stirred magnetically at normal temperature. The obtained mixture is separated to obtain precipitate. The obtained precipitate is washed by water, freezed and dried to obtain solid blocks. The product is calcined in inert atmosphere, and cooled naturally to obtain graphene composite nitrogen and oxygen co-doped biomass carbon material. USE - Method for preparing graphene composite nitrogen and oxygen co-doped biomass carbon material. ADVANTAGE - The method enables to prepare graphene composite nitrogen and oxygen co-doped biomass carbon material that is suitable for popularization, and in simple, eco-friendly and cost effective manner.