介孔钛硅新催化材料

本文综述了介孔钛硅新催化材料的制备方法,归纳评述了各类介孔钛硅材料的制备技术和相应的产物的结构特点,介绍了现有的表征介孔钛硅材料孔结构和钛活性位的重要技术手段和特征,概括了含钛介孔材料在有机物液相催化选择氧化方面的应用,讨论了提高钛位的催化活性、结构稳定性、疏水性、钛硅比等的技术方法;提出了介孔钛硅材料研究存在的问题并展望了将来的研究方向。

New Mesoporous Titanosilicate Catalytic Materials

The preparation strategies of Ti-containing silica mesoporous materials, such as direct synthesis and post- synthesis, are reviewed. The features of synthetic techniques and related structure of Ti-containing mesoporous materials are remarked. The important techniques often used to characterize the structure and titanium active sites of Ti-containing mesoporous materials are introduced. The catalytic performances of Ti-containing mesoporous materials used as catalysts for liquid phase selectively catalytic oxidation of organic substrates are summarized. The methods of modification of Ti- containing mesoporous materials aiming at improving the titanium activity, the structure stability, the hydrophobicity and the value of Ti/Si are discussed. The existing problems and suggestions for further research are presented.