NH2-MIL-125@PAA composite membrane for separation of oil/water emulsions and dyes

Simultaneous removal of petroleum and dye pollutants posed a huge challenge to the development of membranes. NH2-MIL-125 was widely used in separation membranes, but so far had not been used for oil/water separation. We successfully prepared NH2[email protected] acid (referred to as NH2[email protected]) composite membrane on the PVDF by vacuum-assisted self-assembly technology. Due to the introduction of a large number of hydrophilic nanoparticles on the PVDF, the composite membrane exhibited excellent hydrophilicity and underwater oleophobic properties. At the same time, the membrane could efficiently separate oil/water emulsions and dyes. After 10 cycles, the separation rate of the oil/water emulsions and the dye was above 99%, and the flux was above 400 L/m2∙h. Moreover, due to the successful cross-linking of PAA and NH2-MIL-125, the membrane had good stability. Therefore, the composite membrane in this study provided an idea for the removal of multi-component pollutants.