摘要
通过有机模板溶剂热超临界流体干燥法获得四方相TiO2有序介孔(2～4nm)粉体,利用浸泡沉淀法将CeO2填充到TiO2的介孔孔道中,并用HREM、TEM、BET等分析技术,对CeO2/TiO2复合体系的有序介孔结构进行了表征,初步探讨了TiO2介孔结构和CeO2纳米团簇结构的形成机理。结果表明,所制备的CeO2/TiO2体系实现了纳米尺寸结构的均匀复合。
The ordered mesoporous powders of TiO2 with tetragonal structure were prepared by an organic surface active agent, solvent thermal synthesis and supercritical flux drying techniques, then the CeO2 was stuffed into the mesopores of TiO2 powders by an intrusive precipitation method. The ordered mesoporous structure of CeO2/TiO2 composites was characterized by use of TEM, HREM, BET, etc. The formation mechanisms of the mesoporous structure of TiO2 and the structure of nano-CeO2 atomic group were investigated. The results show that the CeO2/TiO2 system has achieved the homogeneous composite structure in nano-size.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2005年第3期75-79,共5页
Acta Materiae Compositae Sinica
基金
山东省自然科学基金资助项目(Y2002F20)
关键词
稀土纳米颗粒
介孔
TIO2
复合体系
Cerium compounds
Characterization
Drying
High resolution electron microscopy
Mesoporous materials
Oxides
Rare earths
Semiconductor materials
Supercritical fluids
Surface active agents
Titanium dioxide
Transmission electron microscopy
