Fabrication of Spinel MnCo ₂ O ₄ Nanocrystal and Its Electrochemical, Magnetic, and Antibacterial Performance

Abstract The spinel MnCo 2 O 4 nanocrystal was effectively synthesized by oil bath co‐precipitation technique. The MnCo 2 O 4 was studied using XRD, FT‐IR, FESEM, and HRTEM techniques to determine its physico‐chemical and surface properties. The FTIR spectrum confirmed the MnCo 2 O 4 nanocrystals' chemical structure, and FESEM and HRTEM analysis revealed their spherical‐like morphologies. The EDS spectrum demonstrated the MnCo 2 O 4 ’s high purity and good crystallinity nature. CV and EIS investigations were used to measure the electrochemical characters of the MnCo 2 O 4 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 MnCo 2 O 4 electrode exhibits specific capacitance values from GCD exhibits 200.4 Fg −1 at 0.5 Ag −1 . The MnCo 2 O 4 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, MnCo 2 O 4 performed ferromagnetically, with a coercivity field of 28 Oe and a saturation magnetization of 17 emu/g. In addition, we have tested the MnCo 2 O 4 nanospheres 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.