Fabrication of Spinel MnCo2O4 Nanocrystal and Its Electrochemical, Magnetic, and Antibacterial Performance

Spinel MnCo₂O₄ nanocrystals are synthesized via oil bath co-precipitation and characterized by XRD, FTIR, FESEM, HRTEM, and EDS, revealing high purity, spherical morphology, and good crystallinity. Electrochemical studies show high specific capacitance and wide potential window. VSM confirms ferromagnetism, and antimicrobial tests indicate inhibition zones of 10.73 mm for E. coli and 7.33 mm for P. aeruginosa.

Abstract

The spinel MnCo₂O₄ nanocrystal was effectively synthesized by oil bath co-precipitation technique. The MnCo₂O₄ was studied using XRD, FT-IR, FESEM, and HRTEM techniques to determine its physico-chemical and surface properties. The FTIR spectrum confirmed the MnCo₂O₄ nanocrystals' chemical structure, and FESEM and HRTEM analysis revealed their spherical-like morphologies. The EDS spectrum demonstrated the MnCo₂O₄’s high purity and good crystallinity nature. CV and EIS investigations were used to measure the electrochemical characters of the MnCo₂O₄ electrode. Using a 2 M tetrabutylammonium perchlorate (TBA) electrolyte, the improved electrode exhibits an extensive potential window of −1.5 to 1.8 V and it delivers the specific capacitance (Cs) of about 673 F/g at 2 mV/s. The MnCo₂O₄ electrode exhibits specific capacitance values from GCD exhibits 200.4 Fg⁻¹ at 0.5 Ag⁻¹. The MnCo₂O₄ electrode achieved capacitive contribution ratios of 72% at s sweep speed of 80 m V s⁻¹. The magnetic properties of nanoparticles were done by VSM instrument at room temperature. According to the data, MnCo₂O₄ performed ferromagnetically, with a coercivity field of 28 Oe and a saturation magnetization of 17 emu/g. In addition, we have tested the MnCo₂O₄nanospheres for antimicrobial activity against Escherichia coli (E. coli) and Pseudomonas aeruginosa (P. eruginosa) and the average zone of inhibition are 10.73 ± 1.18 and 7.33 ± 0.55 mm respectively.

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