▎ 摘　　要

NOVELTY - Production of nano-filtration membrane involves formulating graphene oxide into graphene oxide aqueous solution having concentration of 0.25 mg/L and ultrasonically processing for 30-60 minutes, formulating nano titanium dioxide into aqueous solution having concentration of 0.25 mg/L and ultrasonically processing for more than 30 minutes, mixing graphene oxide aqueous solution and nano titanium dioxide aqueous solution in volume ratio of 2:1-1:5, ultrasonically dispersing, placing polysulfone membrane in an ultrafiltration cup, then placing the mixed solution of titanium dioxide and graphene oxide on surface of the polysulfone membrane under a certain pressure, pressing, and stabilizing for 30-45 minutes so that titanium dioxide and graphene oxide is completely and uniformly deposited on the surface of the polysulfone membrane. USE - Production of nano-filtration membrane used for dye desalination (all claimed). ADVANTAGE - The method provides nano-titanium dioxide blended graphene oxide porous nano-filtration membrane which desalinates dye having molecular weight of 400 or more.