两步法制备镧掺杂氧化铈纳米粉体

稀有金属材料与工程, 2009, 38(z2): 1067-1070.

两步法制备镧掺杂氧化铈纳米粉体

杨晓丹 ^1, , 于然波 ^2, , 宝金荣 ^3, , 王丹 ^4, , 陈骏 ^5, , 邢献然 ^6,

1.北京科技大学,北京,100083

2.北京科技大学,北京,100083

3.北京科技大学,北京,100083

4.中国科学院过程工程研究所,多相复杂系统国家重点实验室,北京,100190

5.北京科技大学,北京,100083

6.北京科技大学,北京,100083

基金项目: 国家自然科学基金(20871015) 北京市基金(2092019) 北京市科技新星计划(2005B20) 教育部长江学者和创新团队发展计划(IRT0708) 教育部新世纪优秀人才支持计划

关键词：纳米氧化铈 , 掺杂 , 催化

Two Step Preparation of Cerium Oxide Nanoparticles Doped with La

Yang Xiaodan ^1, , Yu Ranbo ^2, , Bao Jinrong ^3, , Wang Dan ^4, , Chen Jun ^5, , Xing Xianran ^6,

1.北京科技大学,北京,100083

2.北京科技大学,北京,100083

3.北京科技大学,北京,100083

4.中国科学院过程工程研究所,多相复杂系统国家重点实验室,北京,100190

5.北京科技大学,北京,100083

6.北京科技大学,北京,100083

Keywords： cerium oxide nanoparticles , doped , catalyse

采用共沉淀法合成镧掺杂氧化铈的前驱体,经高温煅烧后得到纳米镧掺杂氧化铈粉体,对所得产物进行了TG-DSC、XRD、FE-SEM、HR-TEM及XPS一系列表征.结果表明,两步法制备的镧掺杂氧化铈是由平均尺寸为2～8 nm的纳米晶粒组成的花状微米球.镧最大掺杂量可达70%,且产物仍能保持氧化铈的立方萤石结构.大比例镧掺杂可以在氧化铈晶体中产生大量的晶体缺陷及氧空位.

Cerium oxide nanoparticles doped with La were sintered from fine powders obtained by co-precipitation/calcinations method. The samples were characterized by TG-DSC, XRD, FE-SEM, HR-TEM and XPS. The obtained CeO_2 doped with La consists of 2-8 nm nanoparticles. When the La doping content reached to 70%, the product still kept the cubic structure. The amount of oxygen vacancy increases with La doping.

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