BaZrO3∶(Ce、Pr)纳米粒子的制备及发光性能研究

Preparation and Luminescence Properties of BaZrO_3∶(Ce,Pr) Nanoparticles

采用醇水溶剂热法制备了BaZrO3∶(Ce、Pr)发光粒子。用XRD,SEM等测试技术分析了样品物相变化及形貌特征;用荧光光度计分析了样品的激发光谱和发射光谱。结果表明,当n(Ba)∶n(Zr)=0.7∶1,反应温度200℃,保温时间20h,V(H2O)∶V(C2H5OH)=1∶3,pH=14时,制备出分散性良好、粒径约39.0nm、形貌近似球形的BaZrO3∶(Ce、Pr)纳米粒子。当掺杂Ce3+、Pr3+摩尔浓度比为1∶3时,样品的发光强度最大。

BaZrO3∶（ Ce,Pr） luminous particles were prepared by alcohol-water solvothermal method. The phase transition and morphology characteristic of the samples were analyzed by XRD and SEM. The excitation and emission spectra of the samples were analyzed by fluorescence spectrophotometer. The results show that the particles,which grain size is about 39. 0 nm,approximately spherical and have good dispersion under the conditions of n（Ba） ∶ n（ Zr） = 0. 7∶ 1,V（ H2O） ∶ V（ C2H5OH） = 1∶ 3,p H = 14,treated at 200 ℃ for 20 h. The superior luminescence property is obtained when the doping molar concentration ratio is Ce3 ＋/ Pr3 ＋= 1∶ 3.