掺杂F^-,Sr^(2+)的氧化铈紫外屏蔽和氧化催化性研究  

UV Shielding and Oxidation Catalytic Properties of F^-/Sr^(2+) Doped Ceria

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5期538-543,共6页Journal of the Chinese Society of Rare Earths

基　　金：北京市自然科学基金资助项目(2092014)

摘　　要：采用沉淀法合成F-,Sr2+单掺杂和共掺杂的氧化铈,探讨了不同掺杂离子对氧化铈紫外屏蔽性能和氧化催化性能的影响。XRD结果表明,F-,Sr2+单掺杂或共掺杂的CeO2均为立方萤石结构,但衍射峰因掺杂离子的不同而稍有偏移。UV-Vis光谱表明,F-,Sr2+单掺杂和共掺杂的氧化铈的紫外屏蔽性能均优于纯氧化铈。共掺杂氟锶后的氧化铈的氧化催化性明显比纯氧化铈的弱,但是,单掺杂氟离子或锶离子的氧化铈的氧化催化性比纯氧化铈的强。F-/Sr2 ＋ mono-doped and co-doped ceria samples were synthesized by precipitation. The UV- shielding and oxidation catalytic properties of the doped ceria were investigated. The X-ray diffraction revealed that the prepared F-/Sr2＋ mono-doped and co-doped eeria samples belonged to the cubic fluorite structure although the peak positions changed depending on the kind of doped ions. The UV-vis spectra showed that both the F-/Sr2＋ mono-doped ceria and co-doped ceria exhibit superior UV-shielding properties compared with un-doped ceria. The oxidation catalytic activity of F-/Sr2＋ co-doped ceria was lower than un-doped ceria, but the F-/Sr2＋ mono-doped ceria had higher oxidation catalytic activities than the undoped ceria.

关 键 词：掺杂氧化铈 紫外屏蔽性能 氧化催化性能 稀土 

分 类 号：TQ133.3[化学工程—无机化工]