Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

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

Lifeng Ding
,
Yuru Song
,
Qiang Li
* ORCID logo ,
Qi Wang
,
Jie Zhang
,
Zhengwei Song
,
Shengling Li
,
Jiayu Liu
,
Xin Zhang
Version 1 : Received: 31 December 2023 / Approved: 2 January 2024 / Online: 2 January 2024 (10:00:04 CET)

How to cite: Ding, L.; Song, Y.; Li, Q.; Wang, Q.; Zhang, J.; Song, Z.; Li, S.; Liu, J.; Zhang, X. Electrochemical study of the Cu2+ sensor based on ZIF-67/MWCNTs/Nafion. Preprints 2024, 2024010076. https://doi.org/10.20944/preprints202401.0076.v1 Ding, L.; Song, Y.; Li, Q.; Wang, Q.; Zhang, J.; Song, Z.; Li, S.; Liu, J.; Zhang, X. Electrochemical study of the Cu2+ sensor based on ZIF-67/MWCNTs/Nafion. Preprints 2024, 2024010076. https://doi.org/10.20944/preprints202401.0076.v1

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 (FT-IR). Cyclic voltammetry (CV), electrochemical impedance (EIS), and square wave solvation 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 makes this sensing platform can be practically applied to the detection of domestic water.

Keywords

Metal Organic Framework; Nanocomposite; Detection of heavy metal Cu2+; Electrochemical Sensor

Subject

Chemistry and Materials Science, Electrochemistry

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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