应用化学2012，Vol.29Issue(7)：808-813,6.DOI:10.3724/SP.J.1095.2012.00363
介孔分子筛Ti-AlKIT-1的制备、表征与催化性能
Synthesis, Characterization and Catalytical Properties of Ti-AlKIT-1 Mesostructured Molecular Sieves
摘要
Abstract
The mixed mesoporous sieves Ti-A1KIT-1 materials were prepared through Ti grafting on AlKIT-1 obtained either directly or by post-synthesis using relatively inexpensive aluminium and titanium precursors, and characterized by FT-IR, XRD, MAS NMR, DRS, EDS and physical adsorption-desorption of nitrogen and used as catalysts toward the oxidation of cyclohexanol in 30% H2O2. XRD and N2 adsorption-desorption showed that the original mesoporous structure of the Ti-A1KIT-1 was retained with a lower BET surface area, pore volume and smaller pore size. Based on the combined FT-IR and DRS studies, it was concluded that the infrared spectroscopy can result a powerful tool to verify the Ti(IV) incorporation into the framework of AlKIT-1. 27Al MAS NMR spectra indicated that the ammonium-washed samples present only tetracoordinated aluminium. All Ti-AlKIT-1 catalysts showed significant activity in the oxidation of cyclohexanol due to the cooperative action of Ti and Al. Ti-Al( ds) K1T-1 with higher Ti/Al molar ratio and BET surface area and pore volume showed better catalytic activity than Ti-Al(ps)KTT-l. The as-prepared catalyst is stable and reusable. The conversion of cyclohexanol was 51.3% after three runs, only decreased by 4. 31% after 48 h catalytic reaction at 80 ℃.关键词
介孔分子筛Ti-AlKIT-1/钛-铝/协同作用/环己醇氧化Key words
mesoporous sieves Ti-AlKTT-1,titanium-aluminium,cooperative action,oxidation of cyclohexanol分类
化学化工引用本文复制引用
李惠云,刘院英,黄东枫,吕倍红..介孔分子筛Ti-AlKIT-1的制备、表征与催化性能[J].应用化学,2012,29(7):808-813,6.基金项目
河南省应用化学重点学科资助课题(教高2008776),安阳市科技攻关项目(2009064) （教高2008776）
