Abstract

Farzaneh hosseini and Mirabdullah Seyed Sadjadi

DOI : http://dx.doi.org/10.13005/ojc/320608

In this work, we report synthesis and characterization of soy lecithin (SL) coated iron oxide nanoparticles by one step co precipitation method in an aqueous solution using ferrous and ferric salts (1:2), different values of SLP (0.0,  1.5 and 6 gr) and ammonia to adjust pH=10.  Characterization of the samples (labeled as SPION, SPION _1.5 and SPION₆) carried out using X-ray powder diffraction (XRD) patterns indicated formation of magnetite (Fe₃O₄) nanoparticles with a calculated average crystalline size of 25 nm for naked Fe₃O₄, 13 nm for SION _1.5 and 9 nm for SION₆ nanoparticles by Sherrer's equation. FT–IR spectroscopy and Thermo-gravimetric analysis (TGA) were used to investigate the presence of SL on the nanoparticles surface. The images and morphology of the samples were examined on scanning electron microscope (SEM). Detailed chemical analysis of the nanoparticles was obtained from energy dispersive X-ray (EDX) data. To measure magnetic properties of the prepared samples, a Vibrating Sample Magnetometer (VSM) was used and a Dynamic Light Scattering (DLS) instrument was finally used to measure hydrodynamic diameter of the nanoparticles. The results revealed that the soybean lecithin was coated on Fe3O4 nanoparticles surface and smaller particle size was obtained with increased concentrations of soybean lecithin.

Water dispersed solution; Soy Lecithin; Surface modification; Iron Oxide magnetic nanoparticles (SPION)

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