溶剂热法合成CeO_2纳米微晶  

Preparation of CeO_2 nanocrystals by solvothermal routes

作　　者：于丽丽[1] 刘宝[1] 钱立武[2] 钱雪峰[2] 

机构地区：[1]山东大学化学与化工学院,山东济南250061 [2]上海交通大学化学化工学院,上海200240

出　　处：《山东大学学报（工学版）》2010年第4期75-79,共5页Journal of Shandong University（Engineering Science）

基　　金：国家自然科学基金资助项目(F20671061);国家重点基础研究计划资助项目(2009CB930400;2007CB209705)

摘　　要：使用简便的混合溶剂法合成稀土CeO2材料,以Ce(NO3)3.6H2O为铈源,PVP为表面活性剂,在乙醇与水混合溶剂体系中反应得到CeO2。通过改变PVP的用量及反应时间制备了不同形貌的CeO2纳米微晶,X射线衍射测定其物象为立方晶系的CeO2,SEM、TEM等测试手段对产物的不同形貌和纳米尺度进行了表征。Eu3+∶CeO2八面体纳米微晶的光致发光(PL)测试结果表明,荧光峰对应着不同的发光中心,有很好的荧光特性。CeO2 nanocrystals were successfully synthesized via a simple alcohol-water solvothermal method using PVP as a capping agent and Ce（NO3）3·6H2O as a precursor.The shape and size of the products could be effectively tuned by controlling the reaction conditions,such as reaction time and the molar ratio of Ce3＋to PVP.X-ray diffraction analysis showed that the phase of the particles was CeO2 of cubic system,and their structures and size were characterized by SEM and TEM.The results of photoluminescence（PL） spectra showed that the fluorescence peak corresponds to different luminescence centers,and the fluorescence of Eu3＋∶CeO2 nanomaterials have excellent photoluminescence.

关 键 词：溶剂热 纳米CEO2 光致发光 

分 类 号：O482.31[理学—固体物理]