Characterization of Supermagnetic Cobalt Ferrite Submicrometer Particles Fabricated Under γ–Irradiation
Auteur(s): Lohohola Osomba Pierre, Mata Niasa Gérard, Tshibangu Kabuya Désiré, Kalele Mulonda Hercule, Mawete Dani Thierry, Mvele Muamba Omer, Muswema Lunguya Jérémie, Ndjoko Imboyo Remy, Ekoko Bakambo GracienNom de la revue/Journal: Science Publishing Group
Mois: juin
Volume: 10
Numéro: 1
Année: 2021
pages: 5-11
Résumé
<p>The surface coated magnetite nanoparticles dispersed into water can be used in clinical for magnetic resonance imaging, for medical diagnosis and for magnetic field-assisted cancer therapy. Based on their applications in many fields, several methods are widely used and reported in literature for the synthesis of iron oxide nanoparticles. In the present paper, we report on the green synthesis of magnetite phase of iron oxide nanoparticles (Fe3O4), which were fabricated using water extracts from the leaves of Moringa oleifera and the inorganic salt FeCl2·7H2O, as iron precursor. The obtained powder was characterized through spectroscopic and thermal methods. The vibrating sample magnetometer was used in order to find out about the magnetic properties of the prepared sample. The Fourier transform infrared spectra (FT-IR) have shown peaks at 402 cm-1 and 593 cm-1, thus confirming the presence of magnetite in powder. X-ray diffraction gave peaks confirming the presence of Fe3O4 in its magnetite phase. Electronic transmission microscopy had indicated that the crystals obtained was of a spherical shape with an average diameter of 50 nm. Gravimetric thermal analysis (GTA) showed a peak centered at around 332°C, signalizing the thermal decomposition of the magnetite. The magnetic properties of the prepared powder exhibited the measured lower coercivity and remanence, demonstrating that the powder under study was made of superparamagnetic particles, suggesting that the prepared magnetite could be a possible candidate for biomedical applications.</p>