摘要
采用共沉淀法制备了氟锶、氟钙掺杂的纳米氧化铈。用X射线衍射(XRD)、扫描电子显微镜(SEM)和紫外-可见(UV-vis)光谱对所制备样品的物相组成、晶粒大小、形貌、紫外屏蔽性能进行了表征。XRD分析表明,氟锶、氟钙阴阳离子共掺杂的CeO2为立方萤石结构,共掺杂阴阳离子使CeO2的晶格常数增大。SEM结果表明,掺杂后的氧化铈均为球形纳米颗粒团聚物。紫外可见(UV-Vis)光谱表明,共掺杂氧化铈的紫外吸收边红移,紫外屏蔽性能增强。
The fluorine-strontium-doped ceria and fluorine-calcium-doped ceria nanoparticles were synthesized by co-precipitation.The phase constitute,particle size,morphology and UV-shielding properties of the synthesized powders were characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM） and ultraviolet visible（UV-vis） spectroscopy,respectively.The XRD confirmed that the fluorine-strontium-doped ceria and fluorine-calcium-doped ceria were cubic fluorite structure,and after co-doping anion and cation the a-cell parameter of ceria increased.The SEM results showed that the doped ceria were agglomeration of spherical nanoparticals.The UV-vis spectra showed a red-shift in UV absorption edge for the doped ceria,and the UV-shielding properties increased.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2011年第2期195-200,共6页
Journal of the Chinese Society of Rare Earths
基金
北京市自然科学基金(2092014)
北京市"优秀人才"资助
关键词
掺杂氧化铈
晶格常数
紫外屏蔽性能
稀土
doped ceria
cell parameter
UV-shielding properties
rare earths
