AP0989 One-Step Green Sonochemical Co-Precipitation Synthesis of Co-Doped Fe3O4 Nanoparticles for Improved Photoluminescence

Abstract

In this study, a simple and single-step sonochemical co-precipitation method used for the synthesis of cobalt-doped Fe₃O₄ magnetic nanoparticles at room temperature. This new method is environmentally friendly used ultrasound irradiation to control the morphology and growth of MNPs, minimizing the use of high temperatures and toxic chemicals. Both of Fe₃O₄ and Co₃O₄ phases are confirmed by the XRD analysis, with an average crystallite size of 10.9 ± 0.5 nm. A spherical morphology of the synthesized nanoparticles is revealed by FE-SEM images with an average particle size of 33.26 nm. EDX and mapping confirmed Fe, Co, and O presence. Photoluminescence (PL) studies showed increased PL intensity for the synthesized nanoparticles compared to undoped Fe₃O₄, due to enhanced surface defects, light absorption, and surface area. The broader 3D pL excitation spectrum of Co₃O₄ in the doped nanoparticles was investigated. These results indicate that this method is simple procedure used to prepare Co-doped Fe₃O₄ nanoparticles with improved photoluminescence properties for applications in bio imaging, drug delivery, sensing, data storage, and environment treatment.