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Electrochemical determination of hydrazine using facilely synthesized Sn-decorated α-Fe<inf>2</inf>O<inf>3</inf> nanoparticles modified electrode
Journal
Journal of Materials Science: Materials in Electronics
ISSN
09574522
Date Issued
2022-06-01
Author(s)
Murugadoss, Govindhasamy
Manibalan, Gunasekaran
Hazra, Subhenjit
Rajesh Kumar, Manavalan
Rajabathar, Jothi Ramalingam
Yadav, Hemraj M.
Abstract
The electroanalytical properties of Sn-decorated α-Fe2O3 nanoparticles have been synthesized by a facile co-precipitation method and the obtained nanoparticles were successfully used for determination of hydrazine. The structural and morphological of the as-prepared nanoparticles were employed using X-ray diffraction (XRD), Fourier-transform infrared (FTIR), scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HR-TEM) techniques. It was revealed from HR-TEM micrographs that tiny Sn nanoparticles grew well on the surface of α-Fe2O3 nanostructure. Optical property of the sample was characterized using UV–Vis spectroscopy. Electrocatalytic activities of Sn/α-Fe2O3 modified electrode was studied using cyclic voltammetry and amperometric measurements in 0.1 M PBS electrolyte towards N2H4 electro-oxidation. The limit of detection for the determination of N2H4 was found to be 10 nM. The modified electrode possessed sensitivities of 41.04 µA cm−2 mM−1 and 13.05 µA cm−2 mM−1 and wide linear ranges from 0.01 × 10−6 to 2.5 × 10−3 M with co-relation coefficient of R2 = 0.998 and R2 = 0.997, respectively. The Sn/α-Fe2O3 modified electrode also proves good reproducibility, long-term stability, selectivity and good antifouling properties. The Sn/α-Fe2O3 modified electrode sensor successfully demonstrated the practical applicability for detection of N2H4 in the real sample analysis.