掺杂纳米氧化铈紫外屏蔽材料的表征与性能  

Characterization and UV-Shielding Properties of Doped Ceria Nanoparticles

作　　者：戴艳[1] 侯永可[1] 龙志奇[1] 黄小卫[1] 崔大立[1] 

机构地区：[1]北京有色金属研究总院稀土材料国家工程研究中心有研稀土新材料股份有限公司,北京100088

出　　处：《中国稀土学报》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

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.

关 键 词：掺杂氧化铈 晶格常数 紫外屏蔽性能 稀土 

分 类 号：TQ133.3[化学工程—无机化工]