Abstract

The Co1-xCuxMn2O4 samples were effectively synthesized by means of chemical reagents and highly scalable co-precipitation technique. X-ray diffraction investigation affirmed the tetragonal structure possessed by Co1-xCuxMn2O4 with crystal size ranging from 12 nm to 22 nm. The crystallite size and micro strain values were correlated using Williamson-Hall plot and size-strain plot method. SEM images showed highly porous, less dense, agglomerated grains with grain size from 3.93 ?m to 13.73 ?m. Vibrational characterization of the samples was completed using FTIR spectra and Raman spectra which affirm the tetragonal structure. The magnetic characterization demonstrates the ferromagnetic nature of the materials which varies with copper substitution

Highlights

  • The materials which are transition metal based originate from Mn3O4 having spinel structure with general formula A2+B3+2O4 [1], where Mn3+ is often replaced by different transition metals such as Cu, Ni, Fe, Co, and Zn to induce semiconductor properties [2]

  • Super capacitors made with transition metal oxides undertake redox reaction for storage of charge which attracted a lot of attention in the past two decades due to their capability to produce high capacitance [3]

  • The peaks were well indexed to lattice planes (011), (020), (022), (004), (220), (132), (231), (040) for all the synthesized samples and there was no sign of impurity phases of precursors, which indicates that, the purity of the samples

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Summary

Introduction

The materials which are transition metal based originate from Mn3O4 having spinel structure with general formula A2+B3+2O4 [1], where Mn3+ is often replaced by different transition metals such as Cu, Ni, Fe, Co, and Zn to induce semiconductor properties [2]. Cobalt manganite (CoMn2O4) has attracted an interest in the field of catalyst, lithium ion battery and electrochemical super capacitor because of its different oxidation states during the redox reaction. Numerous analysts have put forth different attempts in creating transition metal based oxide (essentially got from Mn3O4) nanoparticles through various synthesis techniques, for example, ultrasonic technique [21],co-precipitation [22,23], auto-burning [24], solid state reaction [25,26], ball milling process [27,28], sol-gel [29] techniques and others.

XRD structural analysis
Williamson - Hall plot and size-strain plot method
Surface Morphology
FTIR analysis
Raman Analysis
Magnetic Study
Conclusion
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