YVO_4:Eu纳米微粒的合成及光谱性质研究

Synthesis and Spectra Properties of YVO_4:Eu Nanoparticles

在水热条件下,以Y(NO3)3.6H2O,Eu2O3,NH4VO3,Na3C6H5O7.2H2O为原料合成了YVO4纳米微粒以及稀土离子Eu3+掺杂的YVO4:Eu纳米微粒,利用XRD,FE-SEM,TEM,HRTEM和SAED对所得产物的结构和形貌进行表征,并用FT-IR、F-4600对所得产物的光谱性质进行了分析.结果表明,产物为纯净的四方相YVO4,具有较为规则的饼状形貌,单个饼状YVO4纳米微粒的直径约为500nm.XRD图谱显示稀土离子Eu3+取代了Y3+进入YVO4晶体,但在纳米YVO4:Eu的荧光光谱上没有出现VO43-发射峰,这表明YVO4是良好的发光基质材料.水热合成方法简单易行,合成出的YVO4:Eu粒子荧光强度大且荧光强度稳定.

YVO4 and Eu3＋-doped YVO4 nanoparticles were synthesized via hydrothermal method,using Y（NO3）3.6H2O,Eu2O3,NH4VO3,and Na3C6H5O7.2H2O as starting materials.The structure and morphology of the resulting products were characterized by XRD,FESEM,TEM,HRTEM and SAED,while the spectra properties of the products were investigated by FT-IR spectrometer and fluorescence spectrometer.The results indicate that as-prepared products are crystallized in pure body centered tetragonal YVO4 phase with uniform caky morphologies and the sizes of the samples are estimated to be around 500 nm.XRD patterns of the as-fabricated Eu3＋-doped YVO4 nanoparticles show that Eu3＋ is doped at Y3＋ sites in YVO4 crystal.There is no emission peak of VO43-from fluorescence spectrum of YVO4：Eu nanoparticles,which indicates that YVO4 is a very attractive luminescent host.Hydrothermal method is convenient and easy,and the as-prepared YVO4：Eu nanoparticles show strong and stable fluorescent intensity.It can be expected that the YVO4：Eu nanoparticles have potential application in electroluminescent devices,integrated optics or biological labels.