Photocatalytic ultrafiltration membranes based on visible light responsive photocatalyst: a review

Photocatalytic ultrafiltration membranes have great potential advantages in future-water treatment systems. The preparation of photocatalytic ultrafiltration membranes and the selection of catalysts are the key to the development of photocatalytic ultrafiltration membranes. This paper reviews the research status, removal mechanism of pollutants, module design and applications of photocatalytic ultrafiltration membranes. The metal-doped TiO2 photocatalytic ultrafiltration membranes, non-metal-doped TiO2 photocatalytic ultrafiltration membranes, semiconductor-doped TiO2 photocatalytic ultrafiltration membranes, co-doped TiO2 photocatalytic ultrafiltration membrans, and non-TiO2 system photocatalytic ultrafiltration membranes are introduced in detail. At the same time, it summarizes the removal of micro-pollutants in water, treatment of dyes in water, and applications in other aspects, demonstrating its potential for application in various areas of water treatment systems. Finally, the direction of future research is proposed.