Abstract
In this study, the co-precipitation method has been developed for the synthesized Fe3O4 nanoparticles which are encapsulated with SiO2/C/TiO2 via the facile and further functionalized by the deposition of Y2O3:Eu3+ 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 Fe3O4 core and a tetragonal phase of Y2O3:Eu3+ 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 5D0 → 7F2 of Eu3+ ions at 611 nm. Therefore, the multifunctional nanocomposites are expected to develop many potential applications in biomedical fields and magnetic photocatalyst.
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