Electrochemical study of the Cu2+ sensor based on ZIF-67/MWCNTs/Nafion

IF 2.6 4区化学 Q3 ELECTROCHEMISTRY

Journal of Solid State Electrochemistry Pub Date : 2024-07-30 DOI:10.1007/s10008-024-06017-y

Qiang Li, Lifeng Ding, Yuru Song, Qi Wang, Jie Zhang, Zhengwei Song, Shengling Li, Jiayu Liu, Xin Zhang

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Abstract

In this work, a ZIF-67/MWCNTs/Nafion sensor platform was constructed based on the good adsorption capacity of ZIF-67, the electrical conductivity of multiwalled carbon nanotubes (MWCNTs), and the excellent chemical stability of Nafion for the detection of Cu²⁺ in water. Meanwhile, the modified materials were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), BET-specific surface area test, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and Fourier-transform infrared spectrometry (FTIR). Cyclic voltammetry (CV), electrochemical impedance (EIS), and square wave stripping voltammetry (SWSV) electrochemical methods were used to perform applied test studies on ZIF-67/MWCNTs/Nafion/GCE. The results show that ZIF-67/MWCNTs/Nafion/GCE has high sensitivity (57.5 μA/μM) and a low limit of detection (15.0 nM) for the electrochemical detection of Cu²⁺ ions in an electrochemical sensing system. It has high adsorption selectivity for Cu²⁺, and the recovery of Cu²⁺ in real water reached 98.6–103%. The modified electrode has good repeatability, reproducibility, anti-interference, and stability, which means this sensing platform can be practically applied to the detection of domestic water.

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基于 ZIF-67/MWCNTs/Nafion 的 Cu2+ 传感器的电化学研究

本研究基于 ZIF-67 的良好吸附能力、多壁碳纳米管（MWCNTs）的导电性和 Nafion 的优异化学稳定性，构建了 ZIF-67/MWCNTs/Nafion 传感器平台，用于检测水中的 Cu2+。同时，利用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、BET 比表面积测试、X 射线光电子能谱（XPS）、X 射线衍射（XRD）和傅立叶变换红外光谱（FTIR）对改性材料进行了表征。采用循环伏安法（CV）、电化学阻抗法（EIS）和方波剥离伏安法（SWSV）等电化学方法对 ZIF-67/MWCNTs/Nafion/GCE 进行了应用测试研究。结果表明，ZIF-67/MWCNTs/Nafion/GCE 在电化学传感系统中对 Cu2+ 离子的电化学检测具有高灵敏度（57.5 μA/μM）和低检测限（15.0 nM）。它对 Cu2+ 具有很高的吸附选择性，在实际水中对 Cu2+ 的回收率达到 98.6-103%。改性电极具有良好的重复性、再现性、抗干扰性和稳定性，这意味着该传感平台可实际应用于生活用水的检测。

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来源期刊

Journal of Solid State Electrochemistry 工程技术-电化学

CiteScore

4.80

自引率

4.00%

发文量

227

审稿时长

4.1 months

期刊介绍： The Journal of Solid State Electrochemistry is devoted to all aspects of solid-state chemistry and solid-state physics in electrochemistry. The Journal of Solid State Electrochemistry publishes papers on all aspects of electrochemistry of solid compounds, including experimental and theoretical, basic and applied work. It equally publishes papers on the thermodynamics and kinetics of electrochemical reactions if at least one actively participating phase is solid. Also of interest are articles on the transport of ions and electrons in solids whenever these processes are relevant to electrochemical reactions and on the use of solid-state electrochemical reactions in the analysis of solids and their surfaces. The journal covers solid-state electrochemistry and focusses on the following fields: mechanisms of solid-state electrochemical reactions, semiconductor electrochemistry, electrochemical batteries, accumulators and fuel cells, electrochemical mineral leaching, galvanic metal plating, electrochemical potential memory devices, solid-state electrochemical sensors, ion and electron transport in solid materials and polymers, electrocatalysis, photoelectrochemistry, corrosion of solid materials, solid-state electroanalysis, electrochemical machining of materials, electrochromism and electrochromic devices, new electrochemical solid-state synthesis. The Journal of Solid State Electrochemistry makes the professional in research and industry aware of this swift progress and its importance for future developments and success in the above-mentioned fields.