铽掺杂铈锆固溶体的合成及结构表征

功能材料, 2007, 38(5): 767-770.

铽掺杂铈锆固溶体的合成及结构表征

樊国栋 ^1, , 冯长根 ^2, , 张昭 ^3, , 陈佑宁 ^4,

1.陕西科技大学,化学与化工学院,陕西,咸阳,712081

2.北京理工大学,爆炸灾难预防、控制国家重点实验室,北京,100081

3.陕西科技大学,化学与化工学院,陕西,咸阳,712081

4.陕西科技大学,化学与化工学院,陕西,咸阳,712081

基金项目: 陕西科技大学校科研和教改项目(BJ06-07) 陕西省自然科学基金(2004B13)

关键词： Ce0.6Zr0.4-xTbxO2-y固溶体 , 溶胶-凝胶法 , BET比表面积 , XRD , XPS

Synthesis of Tb-doped ceria-zirconia solid solution and their characteristics

采用溶胶-凝胶法制备了不同比例Tb掺杂的三效催化剂促进剂Ce0.6Zr0.4-xTbxO2-y(x=0.05、0.10、0.15).BET比表面积分析表明,随着Tb的掺杂量由x=0.05递增到x=0.15,在650℃焙烧的样品其比表面积由66.8增加到80.4m2/g,而未掺杂样品Ce0.6Zr0.4O2的比表面积为65.1m2/g.X射线衍射和拉曼光谱证实形成的固溶体为萤石型立方相结构.X光电子能谱分析表明,固溶体表面Ce和Tb主要以Ce4+和Tb3+形式存在,Zr以Zr4+形式存在;掺杂样品组成均匀,Tb的掺入促进了固溶体的形成,增加了表面晶格氧的浓度.

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铽掺杂铈锆固溶体的合成及结构表征

Synthesis of Tb-doped ceria-zirconia solid solution and their characteristics

参考文献