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A new one-pot strategy to LaF3:Ce,Tb@SiO2 core-shell nanostructures

Lina Liu,Ruirui Sun,Yongsheng Zhang,Ruifei Qin,Dongmei Zhang,Chunjuan Tang,Linfeng Chen,Lishuang Liu

LaF 3 :Ce,Tb@SiO 2 core-shell nanostructures were synthesized using a new one-pot reverse microemulsion strategy. One-pot method facilitates the synthetic process of this kind of core-shell nanostructures. The crystalline phase, size, morphology, pore structure and luminescence properties were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), nitrogen physisorption isotherm, photoluminescence (PL) excitation and emission spectra. The results revealed that the core-shell nanostructures have an average diameter of about 27   nm and cores of about 3   nm, and that these nanostructures contain micropores with an average pore diameter of 0.43   nm. The characteristic emissions of Tb 3+ were observed under the excitation of Ce 3+ 4f–5d transition due to the energy transfer from Ce 3+ to Tb 3+ . LaF 3 :Ce,Tb@SiO 2 nanostructures can disperse well in water and the colloid can emit bright green light under ultraviolet (UV) irradiation.