In this work, electrospun nanofibers (NFs) with good moisture-resistance were prepared by electrospinning technology, and further assembled with CdTe quantum dots (CdTe QDs). The results of scanning electron microscopy, transmission electron microscopy and confocal fluorescence microscopy showed that the CdTe QDs with strong fluorescence were uniformly assembled on the surface of electrospun NFs after the electrostatic adsorption for 90 min at pH 7.2. Under 365 nm excitation, the CdTe QDs-NFs assembly presented red fluorescence, which could be significantly quenched by copper ion (Cu²⁺), and the fluorescence quenching degree of CdTe QDs-NFs assembly showed a good linear relationship with Cu²⁺concentration in the range of 0.08–800 μmol/L, and the detection limit was 11.1 nmol/L. This method had advantages of simplicity and high selectivity, and was successfully applied to the visualization and portable detection of Cu²⁺ in environmental water samples.

在这项工作中，通过静电纺丝技术制备了具有良好耐湿性的静电纺丝纳米纤维，并进一步与CdTe量子点（CdTe QDs）组装在一起。扫描电子显微镜，透射电子显微镜和共聚焦荧光显微镜的结果表明，在pH 7.2下静电吸附90分钟后，具有强荧光的CdTe量子点均匀地组装在静电纺丝NF表面上。在365 nm激发下，CdTe QDs-NFs组装体呈现红色荧光，可被铜离子（Cu ²⁺）明显淬灭，CdTe QDs-NFs组装体的荧光猝灭程度与Cu ²⁺具有良好的线性关系。浓度范围为0.08–800μmol/ L，检出限为11.1 nmol / L。该方法具有简便，选择性高的优点，已成功应用于环境水样中Cu ²⁺的可视化和便携式检测。