Screen-Printed Electrode Surface Modification with NiCo2O4/RGO Nanocomposite for Hydroxylamine Detection

Somayeh Tajik; Hadi Beitollahi; Sayed Ali Ahmadi; Mohammad Bagher Askari; Antonio Di Bartolomeo

doi:10.3390/nano11123208

Screen-Printed Electrode Surface Modification with NiCo₂O₄/RGO Nanocomposite for Hydroxylamine Detection

Nanomaterials (Basel). 2021 Nov 26;11(12):3208. doi: 10.3390/nano11123208.

Authors

Somayeh Tajik¹, Hadi Beitollahi², Sayed Ali Ahmadi³, Mohammad Bagher Askari⁴, Antonio Di Bartolomeo⁵

Affiliations

¹ Research Center of Tropical and Infectious Diseases, Kerman University of Medical Sciences, Kerman P.O. Box 76169-13555, Iran.
² Environment Department, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman P.O. Box 76318-85356, Iran.
³ Department of Chemistry, Kerman Branch, Islamic Azad University, Kerman P.O. Box 76351-31167, Iran.
⁴ Department of Physics, Faculty of Science, University of Guilan, Rasht P.O. Box 41335-1914, Iran.
⁵ Department of Physics "E.R. Caianaiello", University of Salerno, 84084 Fisciano, Salerno, Italy.

Abstract

We developed a novel hydroxylamine sensor through the surface modification of screen-printed electrode (SPE) with NiCo₂O₄ nanoparticles/reduced graphene oxide (RGO) nanocomposite (NiCo₂O₄/RGO/SPE). We assessed the electrochemical response of hydroxylamine on the as-fabricated sensor, confirming the high electrocatalytic impact of hydroxylamine oxidation. The electrode produced sensitively responded to hydroxylamine under optimized conditions, with a low limit of detection (2.0 nM) and broad linear dynamic range (0.007-385.0 µM). The presence of NiCo₂O₄ combined with the modification of RGO resulted in sensitive detection and signal amplification of hydroxylamine oxidation. The proposed sensor was used to determine the existence of hydroxylamine in water samples.

Keywords: NiCo2O4/RGO nanocomposite; hydroxylamine; screen-printed electrode; voltammetry.

Abstract

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