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以Bi(NO3)3·5H2O与Na2WO4·2H2O为原料,利用水热法合成了钨酸铋(Bi2WO6)与稀土离子Eu3+掺杂的Bi2WO6多级纳米结构材料。借助于X射线衍射仪(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、高分辨透射电子显微镜(HRTEM)以及荧光光谱仪(PL)等对样品的结构、形貌及发光性能进行表征。结果表明,合成的具有多级结构的Bi2WO6花状微球是由二维纳米片相互交叠而成,为正交相结构;稀土离子Eu3+掺杂Bi2WO6后,其发射光谱由WO6-6的宽带发射与Eu3+的线状发射峰组成,发光中心WO6-6与Eu3+之间存在能量传递,随着Eu3+掺杂浓度的提高,位于615 nm处Eu3+离子的特征发射峰逐渐占据主导地位,同时亦可判断,Eu3+离子取代了阳离子Bi3+的位置进入基质的格位。
Bi2WO6 multi-level nanostructured materials doped with bismuth tungstate (Bi2WO6) and rare earth ions Eu3 + were synthesized by hydrothermal method using Bi (NO3) 3 · 5H2O and Na2WO4 · 2H2O as raw materials. The structure, morphology and luminescent properties of the samples were characterized by means of XRD, SEM, TEM, HRTEM and PL. Characterization. The results show that Bi2WO6 flower-like microspheres with multi-level structure are composed of two-dimensional nanosheets overlapped each other and have an orthorhombic phase structure. The emission spectra of Eu2 + Emission and the Eu3 + linear emission peak. There is energy transfer between the emission center of WO6-6 and Eu3 +. With the increase of Eu3 + doping concentration, the characteristic emission peak of Eu3 + ion located at 615 nm gradually occupy the dominant position, Judging, Eu3 + ions replaced the position of the cation Bi3 + into the matrix lattice sites.