介孔钛硅新催化材料

New Mesoporous Titanosilicate Catalytic Materials

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产物的结构特点;介绍了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。

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.