Wei Yingmei, Liu Hongjie, Wang Shaopeng, Yu Kefu, Wang Liwei
School of Marine Sciences, Coral Reef Research Center of China, Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Guangxi University, Nanning, 530004, PR China.
School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, P.R. China.
Analyst. 2023 Aug 7;148(16):3851-3859. doi: 10.1039/d3an00653k.
High-performance electrochemical sensors have attracted intensive interest in real-time environmental safety monitoring, the Internet of Things, and telemedicine applications. A key limitation to field measurement of pollutant distribution is the lack of a highly sensitive and selective monitoring platform, thus severely hindering the decentralized monitoring of pollutant exposure risk. Hence, a sensor was developed in this study by using a molecularly imprinted polymer (MIP). Specifically, CuO@C@NiCoO, with a large surface area and high conductivity, was coated onto the Au electrode surface and further modified by the anodic electro-polymerization of -phenylenediamine (-PD) using perfluorooctanoic acid (PFOA) as the template, followed by template removal for activation, thus obtaining the Au/CuO@C@NiCoO/MIP electrode. Particularly, an effective monitoring platform derived from this sensor was designed to achieve cost-effective pollution detection. Au/CuO@C@NiCoO/MIP was employed in a disposable microchip sensor for the sensitive detection of PFOA, exhibiting an ultra-low limit of detection (LOD) of 19.46 ng L in a linear range of 207-4140 ng L along with satisfactory sensitivity, selectivity, and reproducibility, which reveal its great potential in the low-cost and efficient field detection of PFOA in coastal seawater. These promising results indicate a bright future for such microchip-sensor-supported PFOA tele-sensing platforms in aiding environmental safety and blue earth protection. We will persist in refining this method to enhance the sensitivity of the sensor for PFOA detection in polluted coastal areas.
高性能电化学传感器在实时环境安全监测、物联网和远程医疗应用中引起了广泛关注。污染物分布现场测量的一个关键限制是缺乏高灵敏度和选择性的监测平台，从而严重阻碍了污染物暴露风险的分散监测。因此，本研究通过使用分子印迹聚合物（MIP）开发了一种传感器。具体而言，将具有大表面积和高导电性的CuO@C@NiCoO涂覆在金电极表面，并使用全氟辛酸（PFOA）作为模板通过对苯二胺（-PD）的阳极电聚合进一步修饰，随后去除模板以进行活化，从而获得Au/CuO@C@NiCoO/MIP电极。特别地，设计了一种源自该传感器的有效监测平台，以实现具有成本效益的污染检测。Au/CuO@C@NiCoO/MIP用于一次性微芯片传感器中，用于灵敏检测PFOA，在207-4140 ng/L的线性范围内表现出19.46 ng/L的超低检测限（LOD），同时具有令人满意的灵敏度、选择性和重现性，这揭示了其在低成本、高效现场检测沿海海水中PFOA方面的巨大潜力。这些有前景的结果表明，这种微芯片传感器支持的PFOA遥感平台在协助环境安全和保护蓝色地球方面有着光明的未来。我们将坚持完善该方法，以提高传感器在污染沿海地区检测PFOA的灵敏度。
