▎ 摘　　要

NOVELTY - Preparing porous sponge graphene comprises adding the graphite powder into the reaction container, adding concentrated sulfuric acid, fully stirring and uniformly mixing, and adding ammonium persulfate, hydrogen peroxide and thiourea, reacting at normal temperature to obtain sponge graphene, soaking sponge graphene in de-ionized water and drying to obtain the porous sponge graphene. USE - The method is useful for preparing porous sponge graphene (claimed). ADVANTAGE - The sponge has high porosity and adsorption, eliminates the pollutant in the sewage, improves groundwater, surface water and water quality of sewage, protects the living and working environment and it can absorb various dyes, oils, organic solvent.