▎ 摘　　要

NOVELTY - Polyurethane foam loaded silver/graphene/titanium dioxide nanoparticle composite material, is claimed. The material contains polyurethane foam as carrier and silver/graphene/titanium dioxide nanoparticle as three-dimensional structure photo catalytically active component. The silver and titanium dioxide modified flaky graphene is stably distributed in polyurethane sponge surface and matrix. The nanoparticle loading amount is 3.5-5.2 wt.%. The silver/graphene/titanium dioxide nanoparticle is silver and titanium dioxide modified flaky graphene. USE - The composite material is useful for degrading oil pollutant in surface water bodies (claimed). ADVANTAGE - The composite material has strong adsorption effect and visible light degrading effect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the polyurethane foam loaded silver/graphene/titanium dioxide nanoparticle composite material, comprising (i) ultrasonic dispersing graphite oxide in a mixed solution of distilled water and formaldehyde to obtain graphene oxide precursor dispersion, adding titanium dioxide nano powder, stirring continuously for 2 hours, transferring the uniformly mixed solution into autoclave, heating, repeatedly washing with distilled water and drying to obtain graphene/titanium dioxide nanoparticle; (ii) taking specific amount of graphene/titanium dioxide nanoparticle, dispersing in 25-35 ml distilled water, adding silver nitrate solution, stirring at room temperature, filtering, washing, drying, and resulting powder into sodium borohydride solution, stirring at room temperature, filtering, washing, and drying at 55-65 degrees C to obtain silver/graphene/titanium dioxide nanoparticle; and (iii) adding specific amount of silver/graphene/titanium dioxide nanoparticle into diphenylmethyl propane diisocyanate, mixing and stirring at 35-45 degrees C, and heating in water bath to obtain liquid A, mixing methylene chloride with polyether polyol and continuing stirring in water bath at 55-65 degrees C to obtain liquid B, preheating the mold at 45-55 degrees C, adding solution A and B into the mold, rapid mixing and rapid stirring, allowing to foam, cooling and allowing to stand at room temperature.