Title: Effect of nickel doping on the structural, optical, electrochemical and magnetic properties of hausmannite (Mn₃O₄) nanoparticles

Authors: S. Karpagavalli; S. John Kennady Vethanathan; S. Perumal

Addresses: Department of Physics, St. John's College, Palayamkottai, 627002, India; Affiliated to: Manonmaniam Sundaranar University, India ' Department of Physics, St. John's College, Palayamkottai, 627002, India; Affiliated to: Manonmaniam Sundaranar University, India ' Noorul Islam College of Arts and Science, Kumaracoil, 629180, India; Affiliated to: Manonmaniam Sundaranar University, India

Abstract: Nickel doped manganese tetroxide (Mn₃O₄) nanoparticles are synthesised by microwave assisted solvothermal route. The structural characterisation of as prepared Ni doped Mn₃O₄ nanoparticles are determined by the aid of powder X-ray diffraction (XRD). The functional groups present in the material are determined by Fourier transform infrared (FTIR) analysis. The transmission electron microscope (TEM) images showed the topographical, compositional and crystalline information. Energy-dispersive X-ray (EDX) analysis determines the abundance of specific elements. The optical properties are analysed by ultraviolet-visible (UV-Vis) spectroscopy. The perceived red shift in the UV-Vis absorption spectra confirmed the stimulated electron-phonon interaction in nickel doped Mn₃O₄ nanoparticles. The electrochemical characteristics of nickel doped Mn₃O₄ nanoparticles are examined by cyclic voltammogram (CV). The vibrating sample magnetometer (VSM) studies confirmed the ferromagnetic behaviour of Ni doped Mn₃O₄ nanoparticles at room temperature.

Keywords: solvothermal method; X-ray diffraction; XRD; electrochemical studies; Fourier transform infrared; FTIR; vibrating sample magnetometer; VSM; ultraviolet–visible; UV-Vis.

DOI: 10.1504/IJNP.2019.104266

International Journal of Nanoparticles, 2019 Vol.11 No.4, pp.305 - 321

Received: 07 Jul 2018
Accepted: 23 Jul 2019
Published online: 23 Dec 2019 *

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