Kormil Saputra, Wida Puteri Agista, Sofiana Aprilia, Teguh Ardianto, Dian W. Kurniawidi, Masruroh Masruroh, Didik Rahadi Santoso, Ahmad Taufiq
The development of functional materials based on metal oxides continues to grow in line with the demand for advanced materials in technological, environmental, and medical applications. In this study, superparamagnetic iron oxide nanoparticles (SPION, MF1) and manganese-doped Fe3O4 (Mn0.25Fe2.75O4, MF2) were successfully synthesized using a modified coprecipitation method. The synthesis involved magnetic separation, acid dissolution, precipitation with NH4OH, and Mn doping. Structural and optical characterizations (XRD, FTIR, UV-Vis) confirmed the formation of cubic spinel structures with notable changes in lattice parameters and crystallite size after Mn incorporation. FTIR spectra revealed O-H, C-O, Fe-O, and Mn-O vibrations, while UV-Vis analysis showed a decrease in band gap energy (from 3.11 eV to 3.07 eV) and Urbach energy (from 0.131 eV to 0.074 eV). These results demonstrate that Mn substitution enhances crystallinity and modifies the electronic properties of Fe3O4, highlighting its potential for photocatalytic and optoelectronic applications. © Published under licence by IOP Publishing Ltd.
Physics Study Program, Mataram Univerity, Jl. Majapahit No.62, Gomong, Kec. Selaparang , Nusa Tenggara Barat., Mataram, 83115, Indonesia; Physics Department, University of Malang, Jl. Cakrawala No.5, Sumbersari, Lowokwaru District , East Java, Malang City, Indonesia; Tinta Emas Institute, Jl. Sultan Salahuddin No.23, Sekarbela District, Nusa Tenggara Barat, Mataram, 83115, Indonesia; Physics Department, Brawijaya University, Jl. Veteran No.10-11, Ketawanggede, Lowokwaru District, East Java, Malang City, 65145, Indonesia
