Abstract
Ni1-xZnxFe2O4 (x = 0.0, 0.2, 0.4, 0.6, 0.8) ferrites were synthesized by the precursor-combustion method employing mixed metal succinato-hydrazinates as the precursors. The ferrites were characterized by X-ray diffraction, infrared studies, X-ray photoelectron spectroscopy, scanning electron microscopy, high-resolution transmission electron microscopy, and Brunauer Emmett Teller analysis. The study of their electrical, magnetic, and dielectric properties highlights the impact of substituting nickel with zinc in the ferrite system. Cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy revealed the faradaic redox behavior in all the synthesized ferrites. Ni0.6Zn0.4Fe2O4 showed the maximum specific capacity of 83.97 C g−1 at a current density of 1 A g−1. Additionally, Ni0.6Zn0.4Fe2O4 selectively exhibited a good response of 31 % towards NH3 gas at an operating temperature of 100 °C. The response and recovery times were 2 and 4 s, respectively.
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