Disposable photoelectrochemical sensing strip for highly sensitive determination of perfluorooctane sulfonyl fluoride on functionalized screen-printed carbon electrode
Disposable photoelectrochemical sensing strip for highly sensitive determination of perfluorooctane sulfonyl fluoride on functionalized screen-printed carbon electrode
复制标题
用于在功能化丝网印刷碳电极上高灵敏度测定全氟辛基磺酰氟的一次性光电化学传感条
DOI：
10.1016/j.talanta.2018.01.005
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发表时间：
2018
期刊：
影响因子：
6.1
通讯作者：
Gong Jingming
中科院分区：
文献类型：
--
作者：
Li Xin;Wang Xinlei;Fang Tian;Zhang Lizhi;Gong Jingming
由于缺乏发色团和可电离的官能团，用传统的高效液相色谱或液相色谱/质谱法测定全氟辛基磺酰氟（PFOSF）是一个重大挑战，特别是在低浓度下。在这项工作中，首次开发了一种独特的光电化学（PEC）传感条用于检测 PFOSF。该传感带具有成本效益且是一次性的，通过简单的一步原位电沉积工艺在自制的丝网印刷电极上制造 BiOI 纳米片阵列，然后将 PFOSF 的分子标签（即分子印迹聚合物）接枝到表面上。受益于三维互连框架，所制造的传感带对传感平台和 PFOSF 目标分析物之间的界面空间位阻效应具有快速响应。精心设计的 PEC 传感器对 PFOSF 浓度范围为 0.05 至 500.0 ppb 表现出出色的线性响应，检测限低至 0.01 ppb (S/N = 3)。此外，我们的低成本、高灵敏度传感器已进一步探索用于检测实际水样中的 PFOSF，显示出令人满意的结果。
Owing to the lack of chromophores and ionizable functional groups, it is a significant challenge to determine perfluorooctane sulfonyl fluoride (PFOSF) by traditional high-performance liquid chromatography or liquid chromatography/mass spectrometry, especially at a low concentration. In this work a unique photoelectrochemical (PEC) sensing strip has been developed for the first time for the detection of PFOSF. The sensing strip is cost effective and disposable, whereby BiOI nanoflake arrays are fabricated on a home-made screen-printed electrode through a facile one-step in-situ electrodeposition process, and then the molecule tags (i.e., molecularly imprinted polymers) for PFOSF are subsequently grafted on the surface. Benefitting from a three-dimensional interconnected framework, the as-fabricated sensing strip has a rapid response to the interfacial steric hindrance effect between the sensing platform and the target analyte of PFOSF. The elaborated PEC sensor exhibits a outstanding linear response to a concentration of PFOSF ranging from 0.05 to 500.0 ppb and a detection limit down to 0.01 ppb (S/N = 3) Furthermore, our low-cost and highly sensitive sensor has been further explored to detect PFOSF in real water samples, showing satisfactory results.