Phyto-mediated synthesis of AgFeO2/MK30 nanocomposite using the ultrasonication method and its photocatalytic behavior and antibacterial studies

This study is the first investigation of a phyto-mediated approach utilizing the carissa edulis fruit extract for the synthesis of AgFeO2/MK30 nanocomposite. The surface-modified AgFeO2/MK30 nanocomposites were characterized by UV-DRS, FT-IR, XRD, XPS, Zeta Potential, FE-SEM, HR-TEM, PL, VSM, and EIS. According to HR-TEM, the nanocomposite has a spherical shape and size ranges from 16 to 49 nm. Compared to pure AgFeO2 nanoparticles, the impedance measurements suggested that the AgFeO2/MK30 nanocomposite has greater resistance, charge separation, and enhanced interfacial properties. The synthesized AgFeO2/MK30 nanocomposite was further tested for its photocatalytic and antibacterial properties. At 75 min, 92 % of the Rhodamine B (RhB) dye was removed by AgFeO2/MK30. Moreover, AgFeO2/MK30 showed strong antibacterial properties, as evidenced by its effective zone of inhibition against S. aureus and K. pneumoniae. The broth microdilution method is used to test the MIC determination and confirm bacterial inactivation in AgFeO2/MK30 nanocomposites. The AgFeO2 exhibits an antibacterial effect on E. coli and B. subtilis, with 9 to 12 mm zones of inhibition. B. subtilis showed greatest amount of inhibition. AgFeO2/MK30 nanocomposite has been analyzed for S. aureus with different concentrations like 62.5, 125, 250, and 500 mu g/mL. The inhibition zone has been found to be 0, 10, 11, 13, and 37. K. pneumonia does not show any zone of inhibition. The minimum inhibitory concentrations showed the lowest inhibitory of the nanocomposite 156.2 mu g/mL for P. mirablis.