Synthesis and Characterization of Zn2SiO4:Mn2+ Nanocrystals and Tuning of Phase by Controlling of Silica Shell Thickness

In this paper is reported the synthesis and characterization of ZnO@Zn2SiO4:Mn2+ and Zn2SiO4:Mn2+ using ZnO@SiO2 nano spheres. The SiO2-shell thickness of the nano sphere was controlled 20 to 60 nm, and was controlled by selecting the reaction time of the Stober method. The Zn2SiO4:Mn2+ as a glaze was prepared by addition of Mn2+ precursor the ZnO@SiO2 core-shell and then reacted in aqueous solution. Finally, the reactant was annealed at 1000 degrees C so that Zn2SiO4:Mn2+ particles were obtained. The influences of the Zn/Si volume ratio on the PL (photoluminescence) properties of Zn2SiO4:Mn2+ were tunable by control the silica thickness of the ZnO core. The structure, morphology and luminescent property of the synthesized samples were determined by XRD (x-ray diffraction), TEM (transmission electron microscopy) and PL (photoluminescence).