摘要
在超声辐射条件下,以Ce(NO3)3.6H2O和六亚甲基四胺(HMT)为原料,使用醇/水反应体系制备了纳米CeO2粉体。采用透射电子显微镜(TEM)、平衡发射极晶体管(BET)对制备的纳米CeO2粉体进行了表征。研究了超声功率以及醇/水反应体系对纳米CeO2粉体粒径和团聚情况的影响,并探讨了其作用机理。结果表明,使用醇/水反应体系以及适当的超声辐射均有利于制备出粒径更小、分散性更好的纳米CeO2粉体,但过高的超声功率则易导致颗粒间的团聚;而且超声辐射能够显著加快反应速度。制备出的CeO2粉体的平均粒径小于10 nm,粒度分布窄,单分散性好。
Nano-powder of CeO2 was prepared in alcohol/water reaction system under ultrasonic raolatlon using Ce（NO3）3 · 6H2O and HMT as raw materials. The prepared nano-sized powder was characterized by means of TEM and BET. The effects of alcohol/water reaction system and ultrasonic power on the size and agglomeration of the as-prepared powder were discussed. The results indicate that alcohol/water reaction system and appropriate ultrasonic radiation are advantaged to prepare nano-CeO2 powder with smaller size and better disperse performance. Ultrasonic radiation can expedite the reaction rate and refine CeO2 nano-particle effectively, but too high ultrasonic power may cause further agglomeration of particles. The CeO2 powder prepared is featured by particle size under 10 nm, narrow distribution and well dispersed.
出处
《化学工程》
EI
CAS
CSCD
北大核心
2007年第4期57-60,共4页
Chemical Engineering(China)
基金
江苏省自然科学基金资助项目(BK2002010)
江苏省高新技术项目(BG2004022)
关键词
纳米CEO2
超声辐射
超声功率
醇水反应体系
nano-sized CeO2
ultrasonic radiation
ultrasonic power
alcohol/water reaction system
