Research Progress on Water Treatment Membranes based on New Photocatalytic Materials

While achieving the separation requirements, the photocatalytic water treatment membrane can use its photocatalytic ability to degrade the pollutants on the surface of the membrane, inhibit the growth of bacteria, and reduce the membrane pollution, which shows unique advantages in water purification and wastewater treatment. Firstly, the basic mechanism of photocatalysis is briefly introduced, and the structure and performance characteristics of different new photocatalytic materials are summarized. Then, focusing on the design and development of photocatalytic water treatment membranes, the application and water treatment performance of graphite carbon-nitride (g-C3N4), carbon quantum dots (CQDs), layered dihydroxide (LDHs), metal-carbon/nitride (MXenes), metal-organic frameworks (MOFs) and covalent organic frameworks (COFs)-based photocatalytic water treatment membranes were emphatically discussed. Finally, the problems existing in the photocatalytic water treatment membrane are analyzed in depth, and its future development is prospected.