The present study has reported an optimized fabrication and application of a novel PVA / TEOS / Schiff base nanofibers membrane as a highly sensitive copper (II) ions in aqueous environment. Here in, for first time, an ultrasound-assisted synthesized symmetric Schiff base has been immobilized on a hybrid polyvinyl alcohol (PVA) and TEOS using electrospinning technique for detection and filtration of copper ions. For this purpose, various working parameters were evaluated and finally the optimized nano fibers membrane was synthesized with 72 nm thickness and PVA / TEOS / Schiff base ratio of (wt%) 8:6:1. The optimized sample named PTLNFM has been employed successfully as an ultra sensitive chemosensor for Cu (II) detection in real samples. The immobilized Schiff base used as a chelating agent could detect copper (II) in the range from 9.34×10⁻⁸ to 1.15×10⁻⁵ mol L^-1 with the following correlation equation: Absorbance = 0.066 [Cu²⁺ ] × 10^-6 + 0.095 and R² = 0.992 and LOD of 1.27 × 10^-8 mol L^-1 which was lower than most of the reported detection limits in the previous literatures. Validity of this method has been carried out by analysis of Cu²⁺ in real samples with satisfying recoveries of over 96.11-99.24%.The developed membrane could be offered for diverse use such as medical or industrial applications.

本研究报告了一种新型PVA / TEOS /席夫碱纳米纤维膜的优化制备和应用，该膜可作为水性环境中的高灵敏度铜（II）离子。在这里，首次使用超声技术将超声辅助的合成对称席夫碱固定在杂化聚乙烯醇（PVA）和TEOS上，用于检测和过滤铜离子。为此，评估了各种工作参数，最后合成了优化的纳米纤维膜，其厚度为72 nm，PVA / TEOS /席夫碱比为（wt％）8：6：1。优化的名为PTLNFM的样品已成功用作超灵敏化学传感器，用于实际样品中的Cu（II）检测。用作螯合剂的固定席夫碱可以检测9.34×10范围内的铜（II）^-8至1.15×10 ^-5 mol L ^-1，具有以下相关方程：吸光度= 0.066 [Cu ²⁺ ]×10 ^-6 + 0.095和R ² = 0.992，LOD为1.27×10 ^-8 mol L ^-1其中低于先前文献中大多数报告的检测限。通过分析实际样品中的Cu ²⁺，回收率达到96.11-99.24％以上，验证了该方法的有效性。开发的膜可提供多种用途，例如医学或工业应用。