College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, China.
School of Energy and Materials, Shanghai Polytechnic University, Shanghai Engineering Research Center of Advanced Thermal Functional Materials, Shanghai Key Laboratory of Engineering Materials Application and Evaluation, Shanghai, 201209, China.
Anal Methods. 2022 Feb 24;14(8):859-868. doi: 10.1039/d1ay02051j.
Traditional detection methods to detect heavy metal ions are time-consuming, complicated, and expensive. Here, we developed a simple electroless plating method to prepare three-dimensional gold nanowire (Au NW) films with high specific surface area. In an aqueous plating bath, tetrachloroauric acid, 4-dimethylaminopyridine and formaldehyde are used as precursor, ligand, and reducing agent, respectively. An electrochemical sensor based on a Au NWs/SPE could be applied for simultaneous detection of lead (Pb(II)), arsenic (As(III)), and mercury (Hg(II)) ions. The detection limits of Pb(II), As(III), and Hg(II) are 2.6, 1.5, and 4.2 μg L, all lower than the permissible limits of the WHO for drinking water (the permissible level of Pb(II) and As(III) is 10.0 μg L, and the permissible level of Hg(II) is 6.0 μg L), respectively. This work presents a simple and novel method to prepare gold nanowires for quick detection of trace heavy metal ions.
传统的重金属离子检测方法耗时、复杂且昂贵。在这里，我们开发了一种简单的化学镀方法，用于制备具有高比表面积的三维金纳米线（Au NW）薄膜。在水相电镀液中，四氯金酸、4-二甲氨基吡啶和甲醛分别用作前体、配体和还原剂。基于 Au NWs/SPE 的电化学传感器可用于同时检测铅（Pb（II））、砷（As（III））和汞（Hg（II））离子。Pb（II）、As（III）和 Hg（II）的检测限分别为 2.6、1.5 和 4.2 μg L，均低于世界卫生组织（WHO）对饮用水的允许限值（Pb（II）和 As（III）的允许限值为 10.0 μg L，Hg（II）的允许限值为 6.0 μg L）。这项工作提出了一种简单而新颖的方法来制备金纳米线，用于快速检测痕量重金属离子。
