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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:16 |
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Conference: Bucharest University Faculty of Physics 2009 Meeting
Section: Educational Physics
Title:
Synthesis of Ferrite Magnetic Nanoparticles – an Experimental Study for Students
Authors:
M. Ursache, C. I. Axinte, C. Nadejde, E. Focanici, D. E. Creanga, F. M. Tufescu
Affiliation:
Faculty of Physics, Al. I. Cuza University, 11A Carol I Blvd., 700506, Iasi, Romania
E-mail
ursachemanuela@yahoo.com
Keywords:
magnetic nanoparticles, nanopowders of magnetite, technical and biomedical applications
Abstract:
A method for obtaining magnetic nanoparticles with different proprieties, in comparison with the usual co-precipitation synthesis, using the microwave (MW) irradiation, is described in the frame of this study. The purpose of this work was to show the students a practical and fast way to prepare nanopowders of magnetite (Fe3O4) based on new protocols found in this field’s literature.
Students should have the basic knowledge on magnetism and general chemistry to be able to understand the composition and behavior of the magnetic nanopowders, to get acquainted with simple ways of synthesis as well as with their technical and biomedical applications. They should learn to prepare magnetite powder samples in the laboratory using available materials and methods. Recently it was found that microwaves could enhance the nanoparticles proprieties. In the present experiment, Fe3O4 nanoparticles were obtained by the chemical precipitation method using FeSO4∙7H2O and FeCl3∙6H2O with the molar ratio 1:1.75. Aqueous ammonia was added as precipitation agent followed by microwave exposure at 100W for two hours at 80oC, the resulting black mixture having better physical proprieties like: higher saturation magnetization and crystallinity of the nanoparticles, small particle size etc. The obtained powders can be characterized using several techniques such as: IR spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-Ray diffraction (XRD) and vibrating sample magnetometer (VSM), etc – from which students could obtain details regarding the samples.
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