▎ 摘　　要

NOVELTY - Preparing photocatalytic ultrafiltration membrane material with visible light activity comprises preparing nitrogen doped-titanium dioxide powder, nitrogen doped-titanium dioxide/graphene oxide (GO) granule ultrafiltration membrane, preparing ultrafiltration membrane with surface loaded with nitrogen doped-titanium dioxide/GO by adding nitrogen doped-titanium dioxide/GO particles into nitrogen doped-titanium dioxide/GO dispersion, placing the ultrafiltration membrane tile in the filter device, pouring nitrogen doped-titanium dioxide/GO dispersion, vacuumizing and drying. USE - The method is useful for preparing photocatalytic ultrafiltration membrane material with visible light activity (claimed). ADVANTAGE - The photocatalytic ultrafiltration membrane material has high visible light activity, high photocatalytic activity, hydrophilicity and poor precipitation of nanoparticles. DETAILED DESCRIPTION - Preparing photocatalytic ultrafiltration membrane material with visible light activity comprises (a) preparing nitrogen doped-titanium dioxide powder by dissolving the butyl titanate in anhydrous ethanol, to form solution A, mixing absolute ethanol, pure water, urea and glacial acetic acid evenly and adjusting the pH, to form solution B, adding solution B in a dropwise manner to solution A under vigorous stirring, continuously stirring, allowing to stand for forming gel, drying, grinding and calcining, to form nitrogen doped-titanium dioxide powder, (b) preparing nitrogen doped-titanium dioxide/graphene oxide (GO) granule by taking graphene oxide (GO), adding pure water, ultrasonically oscillating to make it uniformly dispersed, to obtain GO dispersion, adding nitrogen doped-titanium dioxide powder into the GO dispersion, continuously ultrasonically dispersing, transferring the mixed solution of GO and nitrogen doped-titanium dioxide powder to a high-pressure autoclave, reacting in a high temperature environment, removing, naturally cooling and freeze drying, to obtain nitrogen doped-titanium dioxide/GO particles, (c) preparing ultrafiltration membrane, (d) preparing ultrafiltration membrane with surface loaded with nitrogen doped-titanium dioxide/GO by adding nitrogen doped-titanium dioxide/GO particles into nitrogen doped-titanium dioxide/GO dispersion, placing the ultrafiltration membrane tile in the filter device, pouring nitrogen doped-titanium dioxide/GO dispersion, vacuumizing and drying.