摘要
介孔硅基材料的出现,使沸石中难以完成的大分子催化、吸附和分离过程变为可能。通过对介孔分子筛进行物理及化学改性,可以对其表面性质(内表面及外表面)和孔大小进行精确的控制,同时还可以增强其水热稳定性。改性后的介孔分子筛在大量的催化反应及吸附过程中表现出了比纯硅介孔材料更好的活性、选择性及稳定性。本文拟对介孔硅基材料的合成机理、有机官能化介孔硅基材料在合成与应用方面的研究进展作一简要综述。
The discovery of siliceous mesoporous materials made the possible of catalysis,adsorption,and separation processes involving large molecules,which were rather difficult in small pore systems of zeolites.Internal/external surface properties and pore size of siliceous mesoporous materials can be precisely tuned via physical and/or chemical modifications.Moreover,proper modifications can enhance hydrothermal stability of siliceous mesoporous materials.Nowadays,modified mesoporous silicas showed better activity,selectivity,and/or stability than that of pristine mesoporous silicas in many catalysis and adsorption processes.Synthetic mechanisms of siliceous mesoporous materials and recent progress in synthesis and application of organo-functionalized mesoporous silicas were reviewed.
出处
《广州化工》
CAS
2011年第4期43-46,共4页
GuangZhou Chemical Industry
关键词
介孔材料
有机官能化
合成机理
mesoporous
organo-functionalized
synthetic mechanism
