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

Original scientific paper

Authors

  • Muhammad Abdel Hasan Shallal Department of Chemistry ,College of Sciences, University of Dhi Qar, Iraq https://orcid.org/0000-0001-9442-7977
  • Weaam A. Salman Department of Chemistry, College of Sciences, University of Dhi Qar, Iraq https://orcid.org/0009-0003-3646-1335
  • Athmar Ali Khadim Department of medical laboratory techniques, college of Health and medical techniques, Kufa, Furat Al-Awsat technical university, Kufa, Njaf, Iraq https://orcid.org/0000-0001-7099-9874

DOI:

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

Keywords:

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

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.

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Published

31-12-2025

Issue

Vol. 16 (2026)

Section

Electroanalytical chemistry

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Copyright (c) 2025 Muhammad Abdel Hasan Shallal, Weaam A. Salman, Athmar Ali Khadim

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How to Cite

Enhanced anodic stripping determination of Cd(II) using NH2-functionalized MOF and GO-modified glassy carbon electrode: Original scientific paper. (2025). Journal of Electrochemical Science and Engineering, 16, Article 3101. https://doi.org/10.5599/jese.3101