Proteinaceous materials are promising for membranes due to greater mechanical strength, in-built functionalities, amphiphilicity and high molecular loading capacity. Herein, a novel strategy of functionalization of silk nanofibrils with metal oxyhydroxide and fabrication of ultrafast permeable multi-layered and self-cleaning membrane was demonstrated. Typically, 1.9 µm thick multilayered membrane efficiently purifies macromolecules, dyes, pharmaceutical, surfactants and oil-water emulsion contaminated wastewater with rejection rate > 89% with the flux rate > 883 L m² h⁻¹. Further, the potential of the multilayered membrane was tested for series of different feed concentrations of fluoride and As (V) to validate the commercial applicability of the multilayered membranes for industry wastewater. Notably, even at higher concentration of 10–30 mg L⁻¹, >96% for fluoride and >87% for As (V) rejection was obtained. Furthermore, the functionalized multilayered membrane exhibited outstanding performance for fluoride removal in real water streams, where, it purifies approximately 4710 L.m⁻² in two consecutive cycles, before the quality of the effluents no longer meets WHO criteria. However, the remarkable separation efficiency principally attributed to adsorption sites on the surface of the membrane. Thus, various regeneration strategies were established based on the nature of pollutants. More importantly, photocatalytic Fenton-like reaction assisted self-cleaning property of the multilayered membrane is demonstrated for regeneration of organic fouled membrane. Overall, the present multilayered membrane exhibits superior performance in purifying organic, inorganic contaminated water and oil-water emulsion with excellent recyclability; hence, envisaged its application for Universal water purification.

由于更高的机械强度、内置功能、两亲性和高分子负载能力，蛋白质材料有望用于膜。在此，展示了一种用金属羟基氧化物对丝纳米纤维进行功能化和制备超快渗透多层自清洁膜的新策略。通常，1.9 µm 厚的多层膜可有效净化大分子、染料、药物、表面活性剂和油水乳液污染的废水，截留率 > 89%，通量 > 883 L  m ²  h ^-1. 此外，针对一系列不同进料浓度的氟化物和 As (V) 测试了多层膜的潜力，以验证多层膜在工业废水中的商业适用性。 值得注意的是，即使在 10-30 mg L ^-1的较高浓度下，也获得了>96% 的氟化物和 >87% 的 As (V) 排斥。此外，功能化多层膜在实际水流中表现出出色的除氟性能，其中净化约 4710 Lm ^-2在连续两个循环中，在流出物的质量不再符合 WHO 标准之前。然而，显着的分离效率主要归因于膜表面的吸附位点。因此，根据污染物的性质制定了各种再生策略。更重要的是，证明了多层膜的光催化类芬顿反应辅助自清洁性能可用于有机污染膜的再生。总体而言，本发明的多层膜在净化有机、无机污染水和油水乳液方面表现出优异的性能，具有优异的可回收性；因此，设想将其应用于通用水净化。