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首页> 外文期刊>ACS Omega >Poly(aspartic acid) Electrospun Nanofiber Hydrogel Membrane-Based Reusable Colorimetric Sensor for Cu(II) and Fe(III) Detection
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Poly(aspartic acid) Electrospun Nanofiber Hydrogel Membrane-Based Reusable Colorimetric Sensor for Cu(II) and Fe(III) Detection

机译：基于聚天冬氨酸的电纺纳米纤维水凝胶膜可重复使用的比色传感器，用于检测铜（II）和铁（III）

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摘要

Electrospun nanofiber membrane (ENM) with huge specific surface area is an ideal solid substrate for sensors. However, only a few ENMs are developed into colorimetric sensors and it is even more challenging to fabricate multiple-ion-responsive ENM-based colorimetric sensor. In this study, benefiting from the excellent metal ion adsorption ability of poly(aspartic acid) (PASP) and high specific surface area of nanofibers, a reusable colorimetric sensor utilizing PASP electrospun nanofiber hydrogel membrane (ENHM) was designed to detect Cu2+ and Fe3+ in aqueous solution with simple filtration. The sensor based on PASP–ENHM exhibited high sensitivity and selectivity, and colorimetric responses for Cu2+ and Fe3+ detection could be observed by the naked eye. Upon exposure to Cu2+ aqueous solution, the color of the sensor changed from white to blue with a naked eye detection limit of 0.3 mg/L, while it turned from white to yellow with a detection limit of 0.1 mg/L for Fe3+ detection. Furthermore, this sensor was reusable after metal ion extraction by the desorption process.
机译：具有巨大比表面积的静电纺纳米纤维膜（ENM）是传感器的理想固体基质。但是，只有少数ENM被开发为比色传感器，而制造基于多离子响应的基于ENM的比色传感器则更具挑战性。在这项研究中，得益于聚天冬氨酸（PASP）出色的金属离子吸附能力和纳米纤维的高比表面积，设计了一种利用PASP电纺纳米纤维水凝胶膜（ENHM）的可重复使用的比色传感器，用于检测水中的Cu2 +和Fe3 +。水溶液，简单过滤。基于PASP-ENHM的传感器具有很高的灵敏度和选择性，并且肉眼可以观察到比色对Cu2 +和Fe3 +检测的响应。暴露于Cu2 +水溶液后，传感器的颜色从白色变为蓝色，肉眼检测极限为0.3 mg / L，而从白色变为黄色，检测极限为0.1 mg / L，用于Fe3 +检测。此外，在通过解吸过程提取金属离​​子后，该传感器可重复使用。

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