纳米二氧化铈制备与EPR特性研究  

EPR Properties and Preparation of Nano-ceria

作　　者：李泽彬[1] 殷春浩[1] 赵强[1] 

机构地区：[1]中国矿业大学理学院,江苏徐州221008

出　　处：《徐州工程学院学报（自然科学版）》2009年第1期76-79,共4页Journal of Xuzhou Institute of Technology(Natural Sciences Edition)

基　　金：国家教育部留学回国人员实验室建设科研基金资助项目(2003.18);中国矿业大学优秀创新团队基金资助项目(2004ZCX012)

摘　　要：用溶胶-凝胶法制备了CeO2纳米材料,并在不同焙烧温度下得到颗粒大小不同的CeO2材料.分析了CeO2独特结构特点,研究了不同焙烧温度下制备的CeO2材料颜色不同的原因,发现颗粒大小增大、颜色变浅是由于粒子对可见光的吸收能力减弱,其折射、散射光增多的缘故所致;利用电子顺磁共振(EPR)技术研究了不同焙烧温度下制备的CeO2,发现CeO2具有较强的热稳定性;分析了不同样品中的色心和O2-信号不同的原因.In this paper, nano-ceria is prepared by sol-gel method and various CeO2 samples with different size Of particles are prepared at different calcination temperatures. The paper also analyzes the unique structure of CeO2, and studies the reason for the different colors of CeO2, and discovers that there are slight loss of color with the increase of the particle, the phenomena is due to the reduction of the particles absorbability to visible light and the increase of refracted light and scattered light The CeO2 prepared under calcination temperatures is studies by EPR and the results show CeO2 has good thermal Stability; and different causes of color center and O2 in different samples are also analyzed.

关 键 词：CEO2 EPR 溶胶-凝胶法 

分 类 号：O614[理学—无机化学]