The effects of heavy metals such as Hg(II) and Pb(II) on the human body are profound. Moreover, they pose significant concerns due to industrial development. Thus, the rapid and stable detection of heavy metal ions and related chemicals has emerged as an urgent issue. The application of Differential Pulse Stripping Voltammetry (DPSV) facilitated accurate and rapid detection of Hg²⁺ utilizing MOF materials and ZIF-8 as detection agents. Pure ZIF-8 served as the substrate material. Copper or nickel ions were individually introduced into the substrate material. This process resulted in the formation of bimetallic MOF materials. These materials were designated as CuZn and NiZn, respectively. Transition metal-doped materials were used to modify the glassy carbon electrode (GCE), resulting in a substantial enhancement in the detection performance of Hg²⁺. The CuZn/GCE configuration demonstrated the most significant enhancement. When compared to a GCE modified with pure ZIF-8, both sensitivity and the detection limit for free Hg²⁺ in the environment experienced increases of 450% and 64%, respectively. Stability and repeatability tests were conducted on the CuZn-modified GCE. Results indicated that the electrode proved to be very stable and showed strong selectivity in the presence of interfering ions. The sensor modified with CuZn shows promising potential for monitoring trace Hg²⁺ levels.

中文翻译：

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过渡金属掺杂 ZIF-8 用于检测重金属 Hg(II)

Hg(II)、Pb(II)等重金属对人体的影响是深远的。此外，它们还因工业发展而引起重大关注。因此，快速、稳定地检测重金属离子及相关化学物质已成为一个紧迫的问题。差分脉冲溶出伏安法（DPSV）的应用促进了利用MOF材料和ZIF-8作为检测剂准确、快速地检测Hg ²⁺ 。纯ZIF-8 作为基底材料。将铜或镍离子单独引入到基底材料中。该过程导致双金属 MOF 材料的形成。这些材料分别被指定为 CuZn 和 NiZn。采用过渡金属掺杂材料对玻碳电极（GCE）进行修饰，使得Hg ²⁺的检测性能得到大幅提高。 CuZn/GCE 配置表现出最显着的增强。与用纯 ZIF-8 修饰的 GCE 相比，环境中游离 Hg ²⁺的灵敏度和检测限分别提高了 450% 和 64%。对 CuZn 修饰的 GCE 进行了稳定性和重复性测试。结果表明，该电极非常稳定，并且在存在干扰离子的情况下表现出很强的选择性。用 CuZn 修饰的传感器显示出监测痕量 Hg ²⁺水平的巨大潜力。