Electrochemical determination of hydrazine using facilely synthesized Sn-decorated α-FeO nanoparticles modified electrode

The electroanalytical properties of Sn-decorated α-FeO 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-FeO nanostructure. Optical property of the sample was characterized using UV–Vis spectroscopy. Electrocatalytic activities of Sn/α-FeO modified electrode was studied using cyclic voltammetry and amperometric measurements in 0.1 M PBS electrolyte towards NH electro-oxidation. The limit of detection for the determination of NH was found to be 10 nM. The modified electrode possessed sensitivities of 41.04 µA cm mM and 13.05 µA cm mM and wide linear ranges from 0.01 × 10 to 2.5 × 10 M with co-relation coefficient of R = 0.998 and R = 0.997, respectively. The Sn/α-FeO modified electrode also proves good reproducibility, long-term stability, selectivity and good antifouling properties. The Sn/α-FeO modified electrode sensor successfully demonstrated the practical applicability for detection of NH in the real sample analysis.