Synthesis and Properties of Magnetically Operated Nanocomposites Based on Transition Metals Oxides

2013 Medžiagotyra  
Technique for synthesis magnetically operated nanocomposites based on transition metals oxides (MeFe 2 O 4 , Me = Fe 2+ , Ni 2+ , Co 2+ ) with biologically compatible coating (SiO 2 ) x were developed and optimized. Tetraethoxysilane (TEOS) and sodium silicate were used as precursors for formation of SiO 2 onto surface of magnetic component. Content of SiO 2 in nanocomposite surface layer were adjusted from 0.1 g to 1.0 g for 1.0 g of magnetic component. Structure of the obtained nanocomposites
more » ... ined nanocomposites was studied using XRD method, electron microscopy and IR-Fourier spectroscopy. Influence of adsorbents composition on their magnetic properties was studied using vibration magnetometer. It was shown that values of specific magnetization at saturation for nanocomposites containing 0.2 g of non-magnetic component per 1 g of magnetic component corresponds to the typical values of pure magnetic phase. With increasing of content of non-magnetic components a decrease of specific magnetization at saturation was revealed.
doi:10.5755/ fatcat:qrlgzylxvrhghamzhj35n7fepi