With regard to the treatment of multicomponent wastewaters, to construct multifunctional super-wetting membranes is highly attractive in current decade. In this work, a low-cost and novel NiFe₂O₄/TA/PVDF composite membrane was fabricated via a facile in-situ deposition method under vacuum system. In which, photo-response NiFe₂O₄ nanoparticles were immobilized on the surface of flexible PVDF base membrane via hydrophilic tannic acid (TA) as the binder. The resulting composite membrane exhibited a special superwettability of superamphilicity in air and underwater superoleophobicity with a nanoscale rough surface structure. One the one hand, NiFe₂O₄/TA/PVDF membrane can be used a reusable catalyst in Photo-Fenton degradation of organic dyes with high efficiency. On the other hand, the composite membrane can effectively separate emulsified oils from representative oil-in-water emulsions with excellent separation efficiency all above 99 % and relatively high flux (880–1525 Lm⁻²h⁻¹ bar⁻¹). More importantly, NiFe₂O₄/TA/PVDF composite membrane showed satisfactory processing efficiency, anti-fouling property and excellent reusability in deal with the mixed organic pollutants (water-insoluble emulsified oils and water-soluble organic dyes) existed in one aqueous system, which followed the procedure of initially photo-Fenton degradation of organic dyes emulsion and successively separation the remaining emulsion over the recovered membrane. This successful development of high-performance NiFe₂O₄/TA/PVDF composite membrane will provide a new candidate for both oil/water separation and organic wastewater treatment, as well as promote the utilization of spinel ferrites in the construction of multifunctional membrane for environmental purification.

在处理多组分废水方面，构建多功能超润湿膜在近十年来极具吸引力。在这项工作中，通过真空系统下简便的原位沉积方法制备了一种低成本、新型的 NiFe ₂ O ₄ /TA/PVDF 复合膜。其中，光响应NiFe ₂ O ₄纳米粒子通过亲水性单宁酸（TA）作为粘合剂固定在柔性PVDF基膜的表面上。所得复合膜在空气中表现出超亲和性的特殊超润湿性和具有纳米级粗糙表面结构的水下超疏油性。一方面，NiFe ₂ O ₄/TA/PVDF膜可作为可重复使用的催化剂，高效降解有机染料。另一方面，复合膜可以有效地从代表性的水包油乳液中分离乳化油，具有超过 99% 的优异分离效率和相对较高的通量（880-1525 Lm ^-2 h ^-1  bar ^-1）。更重要的是，NiFe ₂ O ₄/TA/PVDF复合膜在处理存在于一个水性体系中的混合有机污染物（水不溶性乳化油和水溶性有机染料）时，表现出令人满意的处理效率、防污性能和优良的重复使用性，遵循最初的程序有机染料乳液的光芬顿降解，并在回收的膜上连续分离剩余的乳液。高性能NiFe ₂ O ₄ /TA/PVDF复合膜的成功开发将为油水分离和有机废水处理提供新的候选材料，并促进尖晶石铁氧体在构建环保多功能膜中的应用。纯化。