Membrane separation is a simple and efficient technology for waste water treatment. However, organic pollutants such as antibiotics in complex water environment are hard to remove by the physical separation process. The coupling of photocatalysis and membrane separation can effectively remove the oil pollutants, meanwhile degrade the antibiotics. In this work, a composite membrane (BiOCl/TiO₂@PAN) was prepared by the electrospinning technology and hydrothermal process. The membrane showed an excellent superhydrophilicity in air and an underwater superoleophobicity, thus it could separate a series of oil in water emulsions with a high permeability (231–613 L m^-2h⁻¹) without extra energy supply. Moreover, owing to the photoresponse ability of BiOCl and TiO₂, the membrane could effectively degrade a variety of antibiotics including the typical antibiotic tetracycline, chlortetracycline, oxytetracycline and demeclocycline within 30 min under full-spectrum and visible light irradiation. Eight-cycle repeating experiments showed that composite membrane had an excellent stability and an efficiency in photocatalytic degradation and oil–water emulsion separation. Photo-responsive composite membrane prepared in this work showed a broad application prospect in treatment of complex sewage where oily waste and antibiotics simultaneously exist.

膜分离是一种简单有效的废水处理技术。然而，复杂水环境中的抗生素等有机污染物很难通过物理分离过程去除。光催化与膜分离的耦合可有效去除油类污染物，同时降解抗生素。在这项工作中，通过静电纺丝技术和水热工艺制备了复合膜（BiOCl/TiO ₂ @PAN）。该膜在空气中表现出优异的超亲水性和水下超疏油性，因此它可以在不提供额外能量的情况下分离一系列高渗透性（231-613 L m ^-2 h ^-1）的水包油乳液。此外，由于 BiOCl 和 TiO2 的光响应能力₂、该膜在全光谱和可见光照射下，能在30分钟内有效降解包括典型抗生素四环素、金霉素、土霉素和地甲环素在内的多种抗生素。八循环重复实验表明复合膜具有优异的稳定性和光催化降解和油水乳液分离效率。该工作制备的光响应复合膜在处理含油废物和抗生素同时存在的复杂污水方面具有广阔的应用前景。