R. Rahmawati, A. Taufiq, S. Sunaryono, A. Fuad, B. Yuliarto, S. Suyatman, D. Kurniadi
Magnetite (Fe3O4) nanoparticles have been synthesized from iron sands with both coprecipitation and co-precipitation-ultrasonic irradiation methods. X-ray diffraction (XRD) patterns showed that Fe3O4 samples generated by these two synthesis methods are in a single phase with a cubic spinel structure. This research investigates the influence of ultrasonic irradiation in the synthesis process including size, morphology, composition and magnetic properties. The morphology of Fe3O4 was characterized by a transmission electron microscopy (TEM) instrument. The TEM image of Fe3O4 synthesized using the ultrasonic irradiation method showed a reduction of the agglomeration of the Fe3O4 particles. Moreover, the TEM images also showed that the primary particles of Fe3O4 prepared by the co-precipitation method tend to agglomerate as the particles cluster, with the particle size ranging from 9 to 33 nm. Meanwhile, Fe3O4 synthesized using the ultrasonic irradiation method tends to construct a primary particle sized about 25 to 37 nm. The magnetic properties that were characterized by vibrating sample magnetometer (VSM) measurement showed that Fe3O4 exhibited superparamagnetic behavior at room temperature. © 2017, University of Mohammed Premier Oujda Morocco.
Engineering Physics Department, Faculty of Industrial Technology, Institut Teknologi Bandung, Bandung, 40132, Indonesia; Research Center of Nanosciences and Nanotechnology, Institut Teknologi Bandung, Bandung, 40132, Indonesia; Department of Physics, Faculty of Sains and Technology, UIN Sunan Kalijaga, Yogyakarta, 55281, Indonesia; Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang (State University of Malang), Jl. Semarang 5, Malang, 65145, Indonesia
