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基于多孔 MOFs 杂化海绵的便携式耐用传感器,用于荧光可视化检测有机磷农药。

Portable and durable sensor based on porous MOFs hybrid sponge for fluorescent-visual detection of organophosphorus pesticide.

机构信息

College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China.

College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China.

出版信息

Biosens Bioelectron. 2022 Nov 15;216:114659. doi: 10.1016/j.bios.2022.114659. Epub 2022 Aug 27.

Abstract

Pesticide residues have raised serious public concern towards agriculture, environment and food safety. Recently, metal-organic frameworks (MOFs) have been employed as promising recognition and signal generation elements in sensors for pesticide detection. However, the general format of tiny particles with poor dispersity brings obstacles to detection operation and the improvement of sensing performance. Here, we report a sensor based on porous MOFs hybrid sponge for fluorescent-visible detection of methyl parathion. Benefiting from the intermediate of adhesive and porous fibrin film, MOFs are loaded with good dispersion and accessibility, thereby endowing the sensor with a rapid response time of 10-min, a wide linear detection range of 50-2500 μg L, and a low limit of detection of 4.95 μg L. Moreover, the hybrid sensor presented superior durability and anti-interference ability to the detection in complex conditions, including organic solvents, acidic solution, high temperature, and even chemical interferences. This hybrid not only provides a new construction strategy for a nanomaterial-based sensor, but also permits a portable and durable route for the detection.

摘要

农药残留问题引起了公众对农业、环境和食品安全的严重关注。最近,金属-有机骨架(MOFs)作为在农药检测传感器中具有前景的识别和信号产生元件得到了应用。然而,微小颗粒的一般形式,加上较差的分散性,给检测操作和传感性能的提高带来了障碍。在这里,我们报告了一种基于多孔 MOFs 杂化海绵的传感器,用于甲基对硫磷的荧光-可见检测。得益于中间的粘性和多孔纤维蛋白膜,MOFs 具有良好的分散性和可及性,从而使传感器具有 10 分钟的快速响应时间、50-2500μg/L 的宽线性检测范围和 4.95μg/L 的低检测限。此外,与复杂条件下的检测相比,杂化传感器表现出优异的耐用性和抗干扰能力,包括有机溶剂、酸性溶液、高温,甚至化学干扰。这种杂化不仅为基于纳米材料的传感器提供了一种新的构建策略,而且为便携和耐用的检测提供了一种途径。

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