Elok Putri Cindya Sari, Ahmad Taufiq, Arif Hidayat, Robi Kurniawan, Nandang Mufti
Fe3O4/Ag nanocomposite has been successfully synthesized by the coprecipitation method using natural iron sand and Psidium guajava extract. The Fe3O4/Ag Psidium guajava extract nanocomposite was characterized using XRD, FTIR, SEM, and antibacterial tests. The structure of Fe3O4/Ag Psidium guajava extract was determined from the XRD pattern which showed at the highest diffraction peak of Fe3O4 at 2θ = 35.6° and the highest diffraction peak of Ag at 2θ = 38.2°. The lattice parameters of Fe3O4 and Ag nanoparticles were 8.363 Å and 4.086 Å, respectively. The tetrahedral and octahedral Fe-O vibrations were detected at wavenumbers of 713 cm-1 and 507 cm-1. While the Ag-Ag and Psidium guajava functional groups were not detected. Based on the antibacterial activity test against E. coli, the resulted in a good diameter of the inhibition zone. © 2024 Author(s).
Department of Physics, Faculty of Mathematics and Natural Science, Universitas Negeri Malang, Jl. Semarang 5, Malang, Indonesia