采用水热法制备NaY(MoO4)2∶Eu3+@SiO2上转换发光材料,利用X射线衍射(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)、傅立叶变换红外光谱(FT-IR)、荧光光谱(FL)等对合成样品的结构和发光性能进行分析,结果表明,NaY(MoO4)2∶Eu3+@SiO2核-壳结构样品与标准NaY(MoO4)2∶Eu3+的PDF各个特征衍射峰峰位保持一致,且均未出现杂质衍射峰; 微观形貌为核壳结构,NaY(MoO4)2∶Eu3+包覆在SiO2微球表面,得到亚微米级球体。XRD及表面元素含量测定结果表明,Eu3+占据了Y3+的晶格位置; SiO2微球中的Si-OH键可以键合其中的金属离子; 793 nm近红外光激发下,在616 nm处,观察到了Eu3+的上转换特征发射峰(红光发射峰),NaY(MoO4)2∶Eu3+@6.2SiO2粉体的光致发光强度达到纯NaY(MoO4)2∶Eu3+荧光粉体发光强度的3倍以上。

A series of NaY(MoO4)2∶Eu3+@SiO2 up-conversion luminescent material were prepared by hydrothermal method. The structure and luminous properties of the samples were analysed by X-ray diffraction(XRD),Scanning electron microscope (SEM), energy spectrometer (EDS), Fourier transform infrared spectrum (FT-IR), fluorescence (FL) spectrum et al. The results indicate that the diffraction peak positions of the SiO2 core-shell structure samples are consistent with standard pattern of NaY(MoO4)2∶Eu3+at characteristic diffraction peaks and no impurity diffraction peaks appear at all. The morphology of NaY(MoO4)2∶Eu3+@SiO2 is a core-shell structure. NaY(MoO4)2∶Eu3+is coated on the surface of SiO2 microspheres.The sub-microparticles of NaY(MoO4)2∶Eu3+@SiO2 is obtained.It can be known that the Y3+lattice positions are taken place by Eu3+from analysis of EDS and XRD; the Si-OH bond in the SiO2 microsphere can band the metal ion together. Under near-infrared light excitation at 793 nm, the NaY(MoO4)2∶Eu3+@SiO2 samples exhibit red emission at 616 nm. The luminescence intensity of NaY(MoO4)2∶Eu3+@6.2SiO2 is about 3 times stronger than NaY (MoO4) 2∶Eu3+.