Enhanced electrocatalytic activity of Fluorine Doped Tin Oxide (FTO) by Trimetallic spinel ZnMnFeO4/CoMnFeO4 nanoparticles as a novel electrochemical sensor

In the present study, ZnMnFeO 4 and CoMnFeO 4 tri-metallic spinel oxide nanoparticles (NPs) were provided using hydrothermal methods. The nanoparticles have been characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM) and electrochemical techniques. A reliable and reproducible electrochemical sensor based on ZnMnFeO 4 /CoMnFeO 4 /FTO was fabricated for rapid detection and highly sensitive determination of hydrazine by differential pulse voltammetry. It is observed the modified electrode causes a sharp growth in the oxidation peak current and a decrease in the potential for oxidation contrary to the bare electrode. The cyclic voltammetry technique showed, there is high electrocatalytic activity and excellent sensitivity in the suggested sensor for hydrazine oxidation. Under the optimal experimental conditions differential pulse voltammetry method was used for constructing the calibration curve and a linear range of 1.23 × 10 − 6 M to 0.18 × 10 − 3 M with a limit of detection 0.82 ± 0.09 µM was obtained. The obtained results indicate that ZnMnFeO 4 /CoMnFeO 4 /FTO nano-sensor bears pleasant stability, reproducibility, and repeatability in hydrazine measurements. In addition, the suggested sensor was employed efficiently to ascertain the hydrazine in diverse samples of cigarette tobacco.