摘要
柱撑粘土是当前分子工程学研究最为普遍的一族微孔／介孔材料。Ti柱撑粘土以其热稳定性高、表面酸性强和催化性能高而引人注目。采用水解法制备了Ti柱撑粘土（Ti-PILC），通过X射线衍射分析（XRD）、比表面积和孔径分布（BET）、氢程序升温还原（H2—TPR）等方法研究了TiO2在Na蒙脱石上氧物种的催化反应特性。结果表明，Ti柱撑粘土比表面积急剧增大，但TiCl4水解法产生的高浓度酸对皂土结构有一定影响，Ti柱撑粘土的还原温度要比单纯的TiO2粉体降低500℃，具有更高的氧活性，可望在催化领域得到应用。
Pillared clays constitute one of the most widely studies families among the new group of mircroporous or mesoporous materials developed by molecular engineering. Ti-pillared clay is paid attention to in this field for its high thermal stability, strong surface acidity and catalytic activity. Ti-pillared clay is prepared by TICl4 hydrolysis. The reducibility and structural characteristics of the samples are revealed and determined with hydrogen temperature programmed reduction, X- ray diffraction and BET surface area measurement. It is found that TiO2-pillared clayrs special surface area is dramatically increased. Acid treatment is influential on the structure of bentonite. Results show that the reduction temperature of TiO2, when intercalated in the interlayer of Na-bentonite,is decreased for more than 500℃ compared with TiO2. It is expected that highly dispersed TiO2 in the interlayer of Na-bentonite has a wide potential application in the advanced catalytic field.
基金
新疆大学青年教师科研启动基金（QN070132）
