▎ 摘　　要

NOVELTY - Alkenyl water purifying graphene material comprises graphene oxide having three dimensional sponge structure, where an aperture of the sponge structure is 10 nm to 100 microns, and a specific surface area of the sponge structure is more than 40-600 m2/g. USE - The alkenyl water purifying graphene material is useful in sewage treatment field. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing the alkenyl water purifying graphene material comprising (1) preparing oxidized graphite alkene aqueous solution and graphene oxide with different sizes using graphite as raw material, and (2) preparing the graphene sponge, adding water in the graphene oxide water solution, dipping the sponge into graphene by hydro-thermal method and placing the graphite alkene sponge into the water to wash and then drying and freezing.