Construction of Core–Satellite Structure MIL-53(Al, Fe)–OH Decorated Membranes with Adsorption Photocatalysis and Oil/Water Separation

Membrane separation technology has been widely employed in water purification and efficient pollutant removal. In this research, a core–satellite structured bimetallic metal–organic framework (MOF) (MIL-53(Al, Fe)–OH) was grown onto the surface of an electrospun polyamide 66 (PA66) nanofiber membrane via a hydrothermal method. Benefiting from the intrinsic properties of MIL-53(Al, Fe)–OH and the high specific surface area of PA66 membranes, the PA66@MIL-53(Al, Fe)–OH membranes exhibit high wettability and excellent adsorption-photocatalytic and oil/water separation properties. And the prepared membrane demonstrates excellent hydrophilicity and underwater superoleophobicity, with a flux recovery rate of 86.60% for the soybean oil emulsion. Moreover, the incorporation of bimetallic MOFs enhanced photocatalytic activity through the interfacial carrier transfer mechanism, leading to a methylene blue removal rate of nearly 100% within 1.5 h under an alkaline environment. Additionally, the composite membrane maintains a stable wettability in complex chemical environments. These results provide an efficient and sustainable strategy for treating oily wastewater and degrading organic pollutants.