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通过简单的水热法制备了单分散的ZnWO4和ZnWO4:Eu3+纳米棒。用X射线衍射图谱和透射电镜分析了材料的结构和形貌,所得纳米棒均为钨锰铁矿纯相,且Eu3+离子完全进入晶格中。ZnWO4:Eu3+纳米棒的直径为20~40nm,长度为50~70nm。测试了ZnWO4和ZnWO4:Eu3+的激发光谱和发射光谱,结果表明WO2-4基团可以有效地转移能量至Eu3+离子。ZnWO4:Eu3+的发射光谱表明,Eu3+离子的电偶极跃迁5 D0-7F0的特征峰很弱,而5 D0-7F2的电偶极跃迁很强,表明Eu3+离子处于晶体的低对称位置。
Monodispersed ZnWO4 and ZnWO4: Eu3 + nanorods were prepared by a simple hydrothermal method. The structure and morphology of the material were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). All the obtained nanorods were pure wolframite and the Eu3 + ions completely entered the crystal lattice. The diameter of the ZnWO4: Eu3 + nanorods is 20-40 nm and the length is 50-70 nm. The excitation and emission spectra of ZnWO4 and ZnWO4: Eu3 + were tested. The results show that the WO2-4 group can efficiently transfer energy to Eu3 + ions. The emission spectra of ZnWO4: Eu3 + show that the characteristic peaks of the electric dipole 5 D0-7F0 of Eu3 + are weak, while the electric dipole of 5D0-7F2 is very strong, indicating that the Eu3 + ion is in the low symmetry position of the crystal.