▎ 摘　　要

NOVELTY - Porous reduction-oxidation graphene oil absorbing material comprises multistage pore structure stacking in layers based on reduction-oxidation of graphene gas gel and reduced skeleton of graphene oxide gas gel is doped with acid. USE - Used as porous reduced graphene oil absorbing material with controllable doping degree. ADVANTAGE - The material: has excellent hydrophobic and good adsorption capacity for oil and organic pollutants; and realizes purpose of oil-water separation in oil-water composite environment. The method: regulates pore size distribution and pore structure of material; and promotes selective absorption of materials to achieve choice of oil adsorption. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the material comprising (i) preparing graphene oxide water dispersion: mixing reducing agent and graphene oxide water dispersion solution, where the reducing agent is an amino acid, (ii) mixing mixed solution obtained in the step (i) with reducing agent solution, where the reducing agent solution is acidic solution or alkaline solution, acidic substance in the acidic solution is formic acid, acetic acid or oxalic acid, the alkaline substance in the alkaline solution is ammonia water, sodium hydroxide or sodium bicarbonate, (iii) subjecting mixture obtained in the step (ii) to hydrothermal reaction to obtain reduced graphene oxide hydrogel, and (iv) washing the reduced graphene oxide hydrogel, freeze drying under vacuum condition to obtain the product.