The green synthesis of environmentally friendly magnetic silver complex stabilized on MnCoFe2O4@sodium alginate nanoparticles (MCF@S-ALG/Ag) and evaluation of their antibacterial activity

Magnetic nanoparticles with green cover sodium alginate and Ag, MnCoFe 2 O 4 @Sodium alginate/Ag (MCF@S-ALG/Ag) MNPs were prepared by a simple and clean method from Sargassum Vulgare brown algae. The structure of these nanoparticles was characterized by the Fourier transform infrared (FT-IR), X-ray powder diffraction (XRD), field emission-scanning electron microscope (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), thermogravimetric analysis (TGA), and vibrating sample magnetometer (VSM). Furthermore, the antibacterial activity of MCF@S-ALG/Ag MNPs was tested for two bacteria of gram-negative ( Escherichia coli ( E. coli )) bacteria and gram-positive ( Staphylococcus aureus ( S. aureus )) bacteria. The MCF@S-ALG/Ag MNPs showed the inhibition zone 16.32 mm for S. aureus and 12.84 mm for E. coli bacteria. The minimal inhibitory concentration (MIC) and the minimal bactericidal concentration (MBC) of MCF@S-ALG/Ag MNPs for both bacteria were found 20 µg/mL and 40 µg/mL, respectively. Graphical abstract