一元醇热法制备SrHfO_3∶Ce超微球发光粒子

Preparation of SrHfO_3∶Ce Ultramicroballoon Luminous Particles by Unitary Alcohol-Thermal Method

以Sr(NO3)2和HfOCl2·8H2O为原料,乙醇/水作溶剂,KOH为矿化剂,Ce(NO3)3·6H2O作为激活剂,用一元醇热法制备了掺杂Ce3+的SrHfO3超微球粒子。用XRD、SEM、荧光光度计分析了粒子合成过程的物相变化、形貌特征及激发和发射光谱。结果表明:在nSr∶nHf=1∶1,VC2H5OH∶VH2O=4∶1,水热合成温度140℃,反应时间4 h,pH=13.5的条件下,获得SrHfO3∶Ce形貌为微球、分散均匀的粒子,粒径约900 nm。当Ce3+掺杂浓度为0.7mol%时发光强度最大。

The SrHfO3：Ce ultramicroballoon particles were prepared by unitary alcohol-thermal method, by using Sr（NO3）2 and HfOCl2·8H2O as raw materials, using C2H5OH/H2O as solvent, adding KOH aqueous solution as mineralier and Ce（NO3）3·6H2O as activator. The phase transformation and the morphology of powders were studied by XRD and SEM. The excitation and emission spectra of samples were analyzed by the fluorophotometer. The results show that the powders of SrHfO3：Ce are spherical particles with the size of about 900 nm and good dispersibility under the condition of nSr：nHf=1：1, VC2H5OH：VH2O=4：1, pH=13.5, reacted at 140 ℃ for 4 h. The maximum luminous was obtained at doping of 0.7mol% Ce.