▎ 摘　　要

NOVELTY - Preparing graphene-based oil-absorbing sponge comprises (1) pretreating sponge and washing to obtain pretreated sponge, (2) dispersing graphene oxide in water to obtain an aqueous solution of graphene oxide, (3) immersing pretreated sponge in an aqueous solution of graphene oxide, removing out, immersing in aqueous solution of reducing agent, performing reduction reaction at 65-85 degrees C, and cooling to room temperature to obtain graphene oxide-based sponge, and (4) soaking graphene oxide-based sponge in 1-20 vol.% ethanol aqueous solution or deionized water for not less than 10 hours, and drying to obtain graphene-based oil-absorbing sponge. USE - The graphene-based oil-absorbing sponge is useful in the field of oil-water separation e.g. separation of n-hexane, dodecane, toluene, acetone, kerosene, pump oil, gasoline, diesel, and lubricating oil (claimed). ADVANTAGE - The graphene-based oil-absorbing sponge has good hydrophobic property. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for graphene-based oil-absorbing sponge.