▎ 摘　　要

NOVELTY - The preparation method of porous graphene-based composite material involves weighing 10-97.5 pts. wt. graphene oxide and 2.5-80 pts. wt. polyvinyl alcohol solution and then uniformly mixing, adding 0.1-20 pts. wt. crosslinking agent and 0-50 pts. wt. other substances to the mixture, and drying. The other substances are filler or functional additive. Graphene oxide is modified graphene oxide. USE - The method is useful for preparation of porous graphene-based composite material, which is useful as adsorbent for processing oil in water and separating oil and water and filter for removing water-soluble contaminants (claimed). ADVANTAGE - The method enables simple preparation of porous graphene-based composite material with excellent hydrophobicity, hydrophilicity, compression performance and prolonged service life. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for porous graphene-based composite material prepared by the method.