Self-cleaning photocatalytic PVDF membrane loaded with NH2-MIL-88B/CDs and Graphene oxide for MB separation and degradation

In order to effectively solve the two major problems of photocatalyst recovery and membrane fouling, this research combines photocatalyst and membrane separation technology. In this study, the NH2-MIL-88B(Fe)/[email protected] material with good photocatalytic properties was synthesized by hydrothermal method and mechanical stirring, and the photocatalytic membrane was obtained by vacuum filtration. The results show that the NH2-MIL-88B(Fe)/[email protected] membrane can effectively intercept and degrade methylene blue (MB). After 10 cycles, the rejection rate of MB can still reach 99.5%, which is about 2.5 times of pure GO membrane (40%). After 15 min of visible light irradiation, the Flux recovery rate (FRR) of NH2-MIL-88B(Fe)/[email protected] membrane can reach 95%, and the antifouling performance is excellent. In this study, the composite photocatalytic membrane shows excellent stability, photocatalytic performance and self-cleaning property, which is conducive to widening the application prospect of wastewater treatment.