Multifunctional nanocomposites with different coupling agents: synthesis, luminescent and magnetic properties.

In this study, the co-precipitation method has been developed for the synthesized FeO nanoparticles which are encapsulated with SiO/C/TiO via the facile and further functionalized by the deposition of YO:Eu phosphors. Transmission electron microscopy images revealed that the nanocomposites show a spherical morphology with size distribution around 100-250 nm, and the thickness of the coupling agents was 3-4 nm. The X-ray diffraction patterns showed that a cubic spinel structure of FeO core and a tetragonal phase of YO:Eu shell was obtained. The multifunctional nanocomposites showed ferrimagnetic behavior, the negligible coercivity Hc and remanence Mr at room temperature and showed unique europium fluorescence properties with strong red emission peak from the electric-dipole transition D → F of Eu ions at 611 nm. Therefore, the multifunctional nanocomposites are expected to develop many potential applications in biomedical fields and magnetic photocatalyst. [ABSTRACT FROM AUTHOR]