Synthesis and characterization of spherical core–shell particles SiO2@AgEu(MoO4)2

Submicron spherical SiO2 particles have been coated with AgEu(MoO4)2 phosphor layers by a sol–gel process, followed by surface reaction at high temperature, to get core/shell structured SiO2@AgEu(MoO4)2 particles. X-ray diffraction (XRD), Fourier-transformed infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM), and transmission electron microscopy (TEM) were used to characterize the structure and morphology of the resulted core–shell phosphors. The luminescent properties of the core–shell structured phosphors have also been measured at room temperature, and their photoluminescence (PL) spectra are similar to the pure AgEu(MoO4)2 phosphor prepared by the same sol–gel method exhibiting red emission.