In this work, a hybrid of amino-containing Fe-based metal-organic frameworks decorated with gold nanoparticles (Au_nano/Fe-MOFs) has been successfully fabricated via a simple adsorption/reduction of AuCl₄^- on Fe-MOF. The well-distribution of Au_nano on the Fe-MOF surface was confirmed by scanning electron microscopy, X-ray photoelectron spectroscopy and the N₂-sorption characterization. Electrochemical impedance spectroscopy indicated that Au_nano in the Au_nano/Fe-MOF composite facilitated the charge transfer. The Au_nano/Fe-MOF modified glassy carbon electrode (Au_nano/Fe-MOF/GCE) exhibited a superior sensitive response to As(III) by square wave anodic stripping voltammetry (SWASV). Under the optimized conditions, the wide linear ranges of 0.02 ppb ~ 2 ppb and 2 ppb ~ 30 ppb for As(III) detection were achieved with high sensitivity of 4.708 μA·ppb⁻¹. The detection limit (LOD) was found to be 0.0085 ppb (S/N ≥ 3). Furthermore, the proposed Au_nano/Fe-MOF/GCE was successfully employed for As(III) measurement in real water samples with excellent repeatability and selectivity.

在这项工作中，通过简单地吸附/还原 AuCl ₄ ^-在 Fe-MOF 上，成功地制造了一种用金纳米粒子装饰的含氨基的 Fe 基金属有机框架的混合物（Au_纳米/Fe-MOFs）。通过扫描电子显微镜、X 射线光电子能谱和 N ₂吸附表征证实了Au_纳米在 Fe-MOF 表面的良好分布。电化学阻抗谱表明，Au_纳米/Fe-MOF 复合_材料中的Au_纳米促进了电荷转移。Au_纳米/Fe-MOF修饰的玻碳电极（Au _nano/Fe-MOF/GCE) 通过方波阳极溶出伏安法 (SWASV) 对 As(III) 表现出优异的敏感响应。在优化条件下，实现了0.02 ppb ~ 2 ppb 和2 ppb ~ 30 ppb 的As(III) 检测线性范围，灵敏度高达4.708 μA·ppb ^-1。发现检测限 (LOD) 为 0.0085 ppb (S/N ≥ 3)。此外，所提出的 Au_纳米/Fe-MOF/GCE 已成功用于真实水样中的 As(III) 测量，具有出色的重复性和选择性。