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Voltammetric detection of catechol in real samples using MnO2 nanorods-graphene oxide nanocomposite modified electrode

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Abstract

The current effort benefited from a simple hydrothermal production protocol to fabricate a nanocomposite using graphene oxide nanosheets anchored with manganese dioxide nanorods (MnO2 NRs-GO) that was applied to construct a sensitive electrochemical catechol sensing system. As-produced nanocomposite was characterized by Field emission-scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), and Fourier transformed-infrared spectroscopy (FT-IR), which was then drop-casted on glassy carbon electrode (MnO2 NRs-GO/GCE) for sensor application. The MnO2 NRs-GO/GCE showed remarkable electrocatalytic capacity for the redox reaction of catechol, with minimized redox overpotentials and boosted voltammetric peak currents. As-fabricated sensor displayed an admirable electrocatalytic behavior to catechol, with a narrow limit of detection (0.02 µΜ), a broad linear range (0.5–400.0 µM) and an impressive sensitivity (0.0503 µA/µΜ). The MnO2 NRs-GO/GCE was also successful in sensing catechol in real specimens, with appreciable recovery rates.

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Authors and Affiliations

  1. Department of Chemistry, Graduate University of Advanced Technology, Kerman, Iran

    Parisa Karami-Kolmoti

  2. Environment Department, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran

    Hadi Beitollahi

  3. Polymer Department, Graduate University of Advanced Technology, Kerman, Iran

    Sina Modiri

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  1. Parisa Karami-Kolmoti
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  2. Hadi Beitollahi
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Karami-Kolmoti, P., Beitollahi, H. & Modiri, S. Voltammetric detection of catechol in real samples using MnO2 nanorods-graphene oxide nanocomposite modified electrode. Food Measure 17, 1974–1984 (2023). https://doi.org/10.1007/s11694-022-01692-9

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