数字农科院2.0

Development of an origami paper-based electrochemical sensor using N-doped graphene for simultaneous detection of Cd(II), Pb(II), and Hg(II) in water

文献类型： 外文期刊

作者： Jiaqi Wei;Linzhe Wang;Jingfang Hu;Wensong Wei;Yangchun Yang;Yu Song;Yansheng Li;Guowei Gao

作者机构：

关键词： Electrochemical sensor;Heavy metal ions;Microfluidic paper-based analytical device;N-doped graphene;Simultaneous detection

期刊名称： Microchemical Journal

ISSN： 0026-265X

年卷期： 2025 年 212 卷

页码：

收录情况： SCIE（2025版）

摘要： Heavy metals expose great hazards to the ecological environment and public health due to their high toxicity and non-biodegradability. In this work, a low-cost, portable origami electrochemical microfluidic paper-based analytical device (EµPAD) was developed using nitrogen-doped graphene (NG) for simultaneous detection of Cd(II), Pb(II), and Hg(II) in water. The origami structure functions as a valve between sample introduction and detection, reducing sample volume and enhancing operation convenience. Electrochemical linear scanning voltammetry was employed for the first time in the in-situ synthesis of NG on paper-based electrode for sensing heavy metal ions. With its large specific surface area and numerous active sites, NG-modified electrodes exhibited excellent analytical performance for simultaneous determination of Cd(II), Pb(II), and Hg(II). The EµPAD sensor exhibited a wide linear response ranging from 5 to 100 µg/L, and low detection limits (Cd(II): 0.5698 µg/L, Pb(II): 0.4024 µg/L, Hg(II): 0.2565 µg/L,), which were well below the drinking water standards. Additionally, the EµPAD has been successfully applied to real water samples, achieving recoveries of 96.4 % ∼106.2 % with RSDs below 7 %.

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