摘要
Membrane technology for oil/water separation has received increasing attention in recent years. In this study, the hydrophilic/underwater superoleophobic membrane with enhanced water permeability and antifouling ability were fabricated by synergistically assembling graphene oxide(GO) nanosheets and titanium dioxide (TiO ) nanotubes for oil/water separation. GO/TiO membrane exhibits hydrophilic and underwater superoleophobic properties with water contact angle of 62° and under water oil contact angle of 162.8°. GO/TiO membrane shows greater water permeability with the water flux up to 531 L/(m ·h·bar), which was more than 5 times that of the pristine GO membrane. Moreover, GO/TiO membrane had excellent oil/water separation efficiency and anti-oil-fouling capability, as oil residual in filtrate after separation was below 5 mg/L and flux recovery ratios were over 80%.The results indicate that the intercalation of TiO nanotubes into adjacent GO nanosheets enlarged the channel structure and modified surface topography of the obtained GO/TiO membranes, which improved the hydrophilicity, permeability and anti-oil-fouling ability of the membranes, enlightening the great prospects of GO/TiO membrane in oil-water treatment.
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