摘要
以硝酸铈和碳酸氢铵为原料,使用超声双雾化工艺实现微区反应制备了纳米CeO2粉体,并利用透射电子显微镜、X射线衍射分析和红外光谱测试等手段对制备的纳米CeO2粉体的物相结构、形貌及颗粒大小进行了表征,并探讨了超声雾化工艺制备纳米颗粒的反应机理。结果表明,超声雾化工艺所制备的纳米CeO2粉体粒径为3—5 nm,粒度分布均匀,且单分散性好;溶剂中加入的表面活性物质有利于降低雾化液的表面张力,使雾化液滴细化,并且具有一定的空间位阻作用,可以明显改善颗粒间的团聚。
Using Ce（ NO3 ）3 · 6H2O and NH4HCO3 as raw materials, nano-CeO2 particles were prepared by ultrasonic atomization method. The phase, morphology and size of samples were characterized by transmission electron microscope, X-ray diffraction and infrared spectroscopy, and the mechanism of liquid phase miemzone reaction by ultrasonic atomization method was also discussed. The results show that well-dispersod and uniformly-distributed nano-CeO2 particles with sizes of 3-5 nm can be obtained by the above methods. The surface activity substances added into the solution are of advantage to preparing nano-CeO2 particles, which is featured by smaller size and better dispersion.
出处
《化学工程》
CAS
CSCD
北大核心
2009年第11期55-58,共4页
Chemical Engineering(China)
基金
江苏省工业支撑计划项目(BE2008037)
常州市工业科技攻关项目(CE2007068
CE2008083)
关键词
超声雾化
微区反应
纳米CEO2
ultrasonic atomization
microzone reaction
nano-CeO2
