Highly sensitive electrochemical sensor for lead ions based on Bi-MOF/conducting polymer composites

IF 8.1 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Chemosphere Pub Date : 2025-02-01 DOI:10.1016/j.chemosphere.2024.144019

Saleem Ullah Saleem , Zhibin Pang , Yanhua Liu , Jing Sui , Geoffrey I.N. Waterhouse , Zhiming Zhang , Liangmin Yu

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引用次数: 0

Abstract

Herein, conductive polyaniline (PANI) was chemically polymerized on the surface of a bismuth-based metal-organic framework (Bi-MOF) to form conductive PANI@Bi-MOF composites. FT-IR and PXRD measurements verified the successful production of PANI@Bi-MOF, whereas SEM, TEM, and EDAX mapping demonstrated that PANI was uniformly coated on the surface of Bi-MOF. The resulting PANI@Bi-MOF composites were characterized by cyclic voltammetry (CV and electrochemical impedance spectroscopy (EIS), then used to develop a sensitive electrochemical sensor for the detection of lead ions based on differential pulse anodic stripping voltammetry (DPASV). The developed sensor possessed a low detection limit of 0.0108 μg/L and a wide linear detection range (0.025–20 μg/L). The sensor was successfully applied for the detection of Pb²⁺ in real water samples, showing negligible response to other coexisting metal cations. This work offers a feasible approach for detecting Pb²⁺ ions in water.

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基于Bi-MOF/导电聚合物复合材料的铅离子高灵敏度电化学传感器。

本文将导电聚苯胺（PANI）化学聚合在铋基金属有机骨架（Bi-MOF）表面，形成导电PANI@Bi-MOF复合材料。FT-IR和PXRD测量证实了PANI@Bi-MOF的成功生产，而SEM， TEM和EDAX映射表明，聚苯胺被均匀地涂覆在Bi-MOF表面。利用循环伏安法（CV）和电化学阻抗谱（EIS）对所得PANI@Bi-MOF复合材料进行了表征，然后利用差分脉冲阳极溶出伏安法（DPASV）开发了一种灵敏的铅离子检测电化学传感器。该传感器检测限低，仅为0.0108 μg/L，线性检测范围宽（0.025 ~ 20 μg/L）。该传感器成功地应用于实际水样中Pb2+的检测，对其他共存金属阳离子的响应可以忽略不计。本工作为水中Pb2+离子的检测提供了一种可行的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Chemosphere 环境科学-环境科学

CiteScore

15.80

自引率

8.00%

发文量

4975

审稿时长

3.4 months

期刊介绍： Chemosphere, being an international multidisciplinary journal, is dedicated to publishing original communications and review articles on chemicals in the environment. The scope covers a wide range of topics, including the identification, quantification, behavior, fate, toxicology, treatment, and remediation of chemicals in the bio-, hydro-, litho-, and atmosphere, ensuring the broad dissemination of research in this field.