Synthesis and characterization of magnetite nano particles with high selectivity using in-situ precipitation method
Document Type
Article
Publication Date
1-1-2020
Abstract
In-situ precipitation method is widely used and reported in the literature for the synthesis of iron oxide nanoparticles based on their applications in many fields. However, the rate of reaction and rate constant for the production of Magnetite Phase of iron oxide did not study in depth. Reaction rates are required to design a scale-up of the process. In this study, Magnetite phase of iron oxide nanoparticles (Fe3O4) are synthesized by the in-situ precipitation method, and the overall reaction rate is evaluated based on the concentration of Magnetite produced during the process. Further, X-ray diffraction, energy-dispersive X-ray spectroscopy and Raman spectroscopy are used to confirm the presence of a higher proportion of magnetite (Fe3O4) in the final product, which is responsible for more top magnetic properties 74.615 emu. Changes in morphology of these nanoparticles at different intervals of the reaction are reported by transmission electron microscope. The results showed that spherical nanoparticles synthesized at different intervals of the reaction have a very narrow range of particle size, i.e. 9–15 nm. Detailed analysis reveals the presence of a higher share of maghemite (Fe2O3) at the start of the reaction. However, maghemite eventually is converted to magnetite by the end of the reaction, thereby enhancing the magnetic strength of the nanoparticles. © 2019, © 2019 The Author(s). Published with license by Taylor & Francis Group, LLC.
Keywords
Magnetite, coprecipitation, super para-magnetic, agglomeration, break-up
Divisions
nanotechnology
Funders
University of Malaya through PROTOTYPE DEVELOPMENT RESEARCH GRANT SCHEME (PRGS) [Grant (No. PR005-2014A)]
Publication Title
Separation Science and Technology
Volume
55
Issue
6
Publisher
Taylor & Francis