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Fabrication of an Electrochemical Nanosensor Based on MnO₂ Nanoparticles/Poly(Alizarin Yellow R) for Monitoring Hydroquinone as a Potentially Hazardous Health Pollutant
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Afshin Maleki1    , Nader Amini2 , Reza Rezaee1 , Esmail Ghahraani1 , Mahdi Safari1 , Shadieh Mohammadi1 |
1- Environmental Health Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
2- Environmental Health Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran , naderamini95@yahoo.com |
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Abstract: (46 Views) |
Background and Objective: In this study, a novel electrochemical method was proposed for the determination of hydroquinone (HQ) in aqueous solutions. HQ is a widely used chemical compound in the pharmaceutical, dye, photographic, polymer, and cosmetic industries, while it is also considered an important environmental pollutant.
Materials and Methods: To fabricate the nanosensor, a glassy carbon electrode (GCE) was initially modified with manganese oxide nanoparticles (MnOx NPs) and poly(alizarin yellow R) (PAYR). The modified electrode w:::as char:::acterized using scanning electron microscopy (SEM), and electrochemical impedance spectroscopy (EIS). The electrochemical behavior of hydroquinone was investigated over a pH range of 4–9 using the proposed electrode. Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were employed to evaluate the electrocatalytic oxidation behavior of the sensor.
Results: Using cyclic voltammetry (CV), a linear range of 5 to 2100 µM and a detection limit of 2 µM were obtained for the oxidation peak at a potential of 0.15 V. In addition, using differential pulse voltammetry (DPV), a linear range of 1 to 1900 µM and a detection limit of 0.2 µM were obtained.
Conclusion: The results demonstrated that the modified electrode exhibited a low detection limit, a wide linear range, and good repeatability for the determination of HQ at pH 7. Furthermore, the proposed electrode was successfully applied to the determination of hydroquinone in real water samples.
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| Keywords: Hydroquinone, Manganese oxide nanoparticles, Poly (Alizarin Yellow R), Nano sensor, Electrochemistry |
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Type of Study: Original Research |
Subject:
Environmental Health Engineering
Received: 2026/10/2 | Accepted: 2026/10/18
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