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

Original scientific paper

https://doi.org/10.5599/jese.3101

Enhanced anodic stripping determination of Cd(II) using NH2-functionalized MOF and GO-modified glassy carbon electrode

Muhammad Abdel Hasan Shallal ; Department of Chemistry ,College of Sciences, University of Dhi Qar, Iraq
Weaam A. Salman ; Department of Chemistry, College of Sciences, University of Dhi Qar, Iraq
Athmar Ali Khadim orcid id orcid.org/0000-0001-7099-9874 ; Department of medical laboratory techniques, college of Health and medical techniques, Kufa, Furat Al-Awsat technical university, Kufa, Njaf, Iraq *

* Corresponding author.

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Abstract

In this work, an amino-functionalized metal-organic framework (NH2-functionalized MIL-101(Fe) MOF) and graphene oxide (GO) were employed to modify a glassy carbon electrode (GCE) to prepare a simple and sensitive electrochemical sensing platform for detecting Cd(II) ions in drinking water samples. It is important to note that the high surface area, porous structure, and amino-functional groups in the structure of MIL-101(Fe) MOF can signi­ficantly facilitate the enrichment and accumulation of Cd(II) ions at the GCE surface, while the utilization of GO enhances the electrochemical performance and conductivity of the modified electrode. Due to these facts, the NH2-functionalized MIL-101(Fe)/GO-modified GCE exhibited good ability for detecting Cd(II) in comparison with the unmodified GCE. The sensing capability of the NH2-functionalized MIL-101(Fe)/GO-modified GCE was evaluated using differential pulse anodic stripping voltammetry under optimized conditions. Based on quantitative measurements, the as-prepared sensing platform was capable of detecting Cd(II) with a detection limit of 0.004 µM and a linear response range of 0.01 to 12.0 µM. Importantly, the ability of NH2-functionalized MIL-101(Fe)/GO-modified GCE to determine Cd(II) in the real drinking water sample further confirms the practicability of the prepared sensing platform. These results demonstrate the feasibility of a simple, cost-effective electrochemical sensing platform for the sensitive determination of Cd(II) ions, contributing to environmental protection and human health.

Keywords

Environmental monitoring; water analysis; heavy metal ions; electrochemical sensor

Hrčak ID:

344841

URI

https://hrcak.srce.hr/344841

Publication date:

31.12.2025.

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