Identifying ultra-trace amounts of divalent lead ions (Pb) with high response and selectivity, continues to be a pressing issue in identifying environmental pollutants and preventing health complications. This paper details how the in-situ electrodeposited Zn/Cu-BTC-NH metal-organic frameworks (MOFs) boosts Pb concentration for amino adsorption and facilitates ion transfer between Cu element and Pb. The modified coating of the glassy carbon electrode (GCE) exhibits a unique nano-reticulated structure loaded with octahedron particles, the nano-reticulated structure ensures the structural strength of the modified electrode layer, while the loaded octahedral particles enhancing electrocatalytic activity. The ultra-trace detection of Pb at concentrations below μg·L is accomplished by using the square wave anodic stripping voltammetry (SWASV) method, the fabricated Zn/Cu-BTC-NH modified electrode signifies a detection threshold of 0.021 μg L and a clearly ascending linear interval prior to the rise in Pb concentration to 120 μg L. The reported electrochemical method for the precise identification of Pb in water-based solutions offers a practical approach for modifying MOFs materials and detecting heavy metal ions.

中文翻译：

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基于具有纳米网状增强微结构的zn/cu-btc-nh2双金属MOF的高灵敏度和高选择性铅离子电化学传感器


以高响应度和选择性识别超痕量二价铅离子 (Pb) 仍然是识别环境污染物和预防健康并发症的紧迫问题。本文详细介绍了原位电沉积 Zn/Cu-BTC-NH 金属有机骨架 (MOF) 如何提高氨基吸附的 Pb 浓度，并促进 Cu 元素和 Pb 之间的离子转移。玻碳电极（GCE）的改性涂层表现出独特的负载八面体颗粒的纳米网状结构，纳米网状结构保证了修饰电极层的结构强度，同时负载的八面体颗粒增强了电催化活性。采用方波阳极溶出伏安法（SWASV）方法实现了μg·L以下浓度Pb的超痕量检测，所制作的Zn/Cu-BTC-NH修饰电极的检测阈值为0.021 μg·L，清晰Pb 浓度升至 120 µg·L 之前呈上升线性区间。所报道的用于精确识别水基溶液中 Pb 的电化学方法为修饰 MOF 材料和检测重金属离子提供了实用方法。