▎ 摘　　要

NOVELTY - Preparing a graphene/copper nanocrystalline composite catalytic material comprises (i) dissolving coniferene and copper salt in ethanol to make a mixed solution, ultrasonically dispersing the graphene in N, N-dimethylformamide to make a graphene dispersion, adding the mixed solution to the graphene dispersion, centrifuging the mixture, washing, and freeze-drying to obtain monodispersed graphene/copper nanocrystals, (ii) dispersing 5-10 pts. wt. graphene/copper nanocrystals in 50 pts. wt. deionized water, adding 1-1.5 wt.% sodium citrate and stirring the reaction continuously, freezing and vacuum drying. USE - The method is useful for preparing a graphene/copper nano crystalline. ADVANTAGE - The nano crystalline: is simple, economical and suitable for various environmental conditions; has excellent adsorption performance, high decomposition efficiency and prolonged service life.