摘要
采用模板自组装的方法一步合成介孔氧化锆材料,并利用TG-DTA、SAXRD、N2吸附和HRTEM对材料进行表征。结果发现,经400℃焙烧后模板剂能够完全脱除;低角度XRD结果显示材料具有良好的介孔结构;N2吸附结果得到介孔氧化锆的孔径为3.7nm,比表面积为165.3m2/g。介孔氧化锆经不同温度焙烧后的XRD和HRTEM结果表明,600℃焙烧后仍能保持介孔结构,更高温度焙烧介孔结构被破坏;选区电子衍射显示在介孔孔壁上有部分的纳米晶生成。
Mesoporous zirconia materials were synthesized by the self-assembly method and characterized via TG, SAXRD, N2-adsorption and HRTEM. TG indicated the organic species were completely removed upon calcination in air at 400 oC. The appearance of low-angle diffraction peaks showed the mesoscopic order in this materials. Nitrogen adsorption-desorption isotherms and BJH pore-size distribution for mesoporous zirconia presented mean pore size of 3.7 nm with surface area of 165.3 m2/g. The thermal stability of the prepared mesoporous zirconia materials were tested at different calcination temperatures from 400 oC to 800 oC. XRD and HRTEM found that the structure of mesoporous zirconia remained under 600 oC, but was damaged at higher temperature. Selected-area electron diffraction showed that some ZrO2 nanocrystallites were embedded in the mesoscopically ordered semicrystalline wall.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2010年第S2期442-445,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金项目(20433030
906100002
20801050)
关键词
介孔材料
介孔氧化锆
模板自组装
mesoporous materials
mesoporous zirconia
self-assembly method
