电纺合成富含单宁的纳米纤维固态膜，用于废水环境监测和修复

重金属，有机染料和水危害人类/动物健康中的细菌污染，因此，污染物的检测，吸附和捕获对于环境安全至关重要。 富含配体的膜对于传感器，吸附和细菌净化有希望。 本文，单宁（TA）增强3-氨基丙基三乙氧基硅烷（APTES）通过静电连接制造的基于纳米纤维膜（PCL-TA-APTES）的交联聚二苯二甲酸（PCL）的纳米纤维膜（PCL-TA-APTES）。 PCL-TA-APTES纳米纤维具有比未连接的膜相比具有优越的热，机械，结构，化学和水性稳定性的。 由于超分子铁宁网络（FETA）相互作用，它对Fe2+/3+离子的响应响应于淡黄色。 吸附 - 吸附周期后已经注意到了这种选择性传感。 Fe3+浓度，溶液pH，接触时间和配体浓度会影响羊乳酪配位。 在优化的条件下进行图像处理，引入的膜显示了与Fe3+离子（16.58μm至650μm）的比色线性关系，检测极限为5.47μm。 PCL-FETA-APTES膜可以限制酚类氧化并导致部分水不溶网络。 吸附过滤结果表明，PCL-FETA-APTES膜可以重复使用，并且比PCL-TA-APTES膜（14.96 mg/g）具有更高的亚甲基蓝色吸附（32.04 mg/g）。 纳米复合材料对基于Fe3+的S.金黄色S.金黄色液体悬浮液的高捕获效率表明，通过Fe3+/ta依赖性生物接口相互作用，Fe3+结合的细菌粘附在纳米复合材料上。 总体而言，高表面积，丰富的酚配体，多孔微观结构和超润湿特性加快了纳米复合材料中的羊乳酪配位，对于Fe2+/3+离子感测至关重要，亚甲基蓝色的吸附滤光并捕获了Fe3+绑定的细菌。 这些多功能性能可以保证在废水和环境保护中的纳米复合膜实用性。

Heavy metals, organic dyes and bacterial contamination in water pose threats to human and animal health, so the detection, adsorption and capture of pollutants are critical for environmental safety. Ligand-rich membranes demonstrate great potential for sensors, adsorption applications and bacterial purification. In this work, a tannic acid (TA)-reinforced 3-aminopropyltriethoxysilane (APTES)-crosslinked polycaprolactone (PCL)-based nanofibrous membrane (designated as PCL-TA-APTES) was fabricated via electrostatic linkage. The PCL-TA-APTES nanofibers exhibit superior thermal, mechanical, structural, chemical and aqueous stability compared to the uncrosslinked pristine membrane. Owing to the formation of supramolecular Fe-TA (FETA) network interactions, the membrane displays a colorimetric response to Fe²+/Fe³+ ions, turning pale yellow. This selective sensing performance has been verified even after multiple adsorption-desorption cycles. The concentration of Fe³+, solution pH, contact time and ligand concentration all affect the metal-ligand coordination behavior. Under optimized detection conditions, the as-prepared membrane exhibits a linear colorimetric response to Fe³+ ions over the concentration range of 16.58 μM to 650 μM, with a limit of detection (LOD) of 5.47 μM. The PCL-FETA-APTES membrane can inhibit phenolic oxidation and form a partially water-insoluble network structure. Adsorption filtration tests reveal that the PCL-FETA-APTES membrane is reusable, and delivers a higher methylene blue adsorption capacity (32.04 mg/g) than the PCL-TA-APTES membrane (14.96 mg/g). The high capture efficiency of the nanocomposite towards Fe³+-modified Staphylococcus aureus liquid suspensions indicates that Fe³+-bound bacteria adhere to the nanocomposite via Fe³+/TA-dependent biointerface interactions. Overall, the high specific surface area, abundant phenolic ligands, porous microstructure and superwettable properties of the nanocomposite accelerate the metal-ligand coordination, which is critical for Fe²+/Fe³+ ion sensing, methylene blue adsorption filtration and Fe³+-bound bacterial capture. These versatile functionalities guarantee the practical applicability of the nanocomposite membrane in wastewater treatment and environmental protection.