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以NH3.H2O和NH4HCO3混合溶液做复合沉淀剂,用共沉淀法制备了SrZrO3:Ce纳米粒子。用热重-差热分析和扫描电子显微镜、透射电子显微镜分析了前驱体的物相变化、粒子形貌,用荧光光度计分析了样品的激发和发射光谱。结果表明:当金属盐溶液的起始浓度为0.10mol/L,体系温度为0℃,滴定速率为3mL/min时,添加1.05×10-3mol.L十二烷基苯磺酸钠做分散剂,pH=11.0,在1000℃煅烧3h,合成出具有良好的分散性、粒径约40nm、近似球形的SrZrO3:Ce粒子。当Ce3+掺杂摩尔分数为0.5%时,样品的相对发光强度最大,且激发光谱和发射光谱峰值分别对应247、487 nm和496 nm波长处。
With NH3.H2O and NH4HCO3 mixed solution as a composite precipitant, SrZrO3: Ce nanoparticles were prepared by coprecipitation method. Thermogravimetry - differential thermal analysis and scanning electron microscopy, transmission electron microscopy analysis of the precursor phase changes, particle morphology, with a fluorescence spectrophotometer sample excitation and emission spectra. The results showed that when the initial concentration of the metal salt solution was 0.10mol / L, the system temperature was 0 ℃ and the titration rate was 3mL / min, 1.05 × 10-3mol.L sodium dodecyl benzene sulfonate was added as dispersant , pH = 11.0, and calcined at 1000 ℃ for 3h to synthesize SrZrO3: Ce particles with good dispersibility and particle size of about 40nm. When Ce3 + doping molar fraction is 0.5%, the relative luminescence intensity of the sample is the largest, and the peak of the excitation spectrum and the emission spectrum correspond to the wavelengths of 247, 487 nm and 496 nm, respectively.