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Journal of Electrochemical Science and Engineering, Vol. 16 , 2026.

Original scientific paper

https://doi.org/https://doi.org/10.5599/jese.3156

Application of MWCNTs/Uio-66(Zr)-NH₂ MOF modified electrode for anodic stripping determination of Cu(II) in water samples

Mais A. Mohammed ; Department of Applied Chemistry, College of Applied Sciences, University of Technology, Iraq *
Mustafa Abdul-Sattar Ibrahem Al-Hamid ; Energy and Renewable Energies Technology Research Center, University of Technology, Baghdad, Iraq
Dalia M. Jamil ; Chemistry Department, Science College, Al-Nahrain University, Iraq
Shaimaa B. Al-Baghdadi ; Energy and Renewable Energies Technology Research Center, University of Technology, Baghdad, Iraq

* Corresponding author.

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Abstract

In this research, a procedure was developed for the detection of Cu(II) ions in water using a glassy carbon electrode modified with a nanocomposite of multi-walled carbon nanotubes and a zirconium-based metal-organic framework (MWCNTs/Uio-66(Zr)-NH₂ MOF/GCE). The analysis was performed by differential pulse anodic stripping voltammetry. The excellent sensitivity of the created sensor (MWCNTs/Uio-66(Zr)-NH₂ MOF/GCE) for Cu(II) determi­nation is attributed to the synergy between the strong chelating ability of the terminal amino groups (-NH₂) on the Uio-66 (Zr)-NH₂ MOF for metal ions and the extensive surface area provided by the MWCNTs. The key parameters influencing the stripping current res­ponse of Cu(II), namely, pH, accumulation potential, and accumulation time, were syste­ma­tically studied and optimized. Under optimal conditions, the stripping peak current of Cu(II) ions exhibited a linear relationship with concentration over the range of 0.001 to 10.0 μM. The limit of detection for Cu(II) ions was calculated to be 0.0005 μM. Finally, the MWCNTs/Uio-66 (Zr)-NH₂ MOF/GCE sensor was employed to determine Cu(II) ions in real water specimens, yielding acceptable recovery rates.

Keywords

Heavy metal ions determination; Cu(II) ions; environmental monitoring; chemically modified electrode; voltammetric sensor

Hrčak ID:

351280

URI

https://hrcak.srce.hr/351280

Publication date:

5.5.2026.

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