Post-synthesis and catalytic performance of FER type sub-zeolite Ti-ECNU-8  

作　　者：Bo-Ting Yang Peng Wu 

机构地区：[1]Shanghai Key Laboratory of Green Chemistry and Chemical Processes,Department of Chemistry,East China Normal University

出　　处：《Chinese Chemical Letters》2014年第12期1511-1514,共4页中国化学快报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.21373089,U1162102);PhD Programs Foundation of Ministry of Education(No.2012007613000);the National Key Technology R&D Program(No.2012BAE05B02);the Shanghai Leading Academic Discipline Project(No.B409)

摘　　要：A titanosilicate Ti-ECNU-8 with a FER type sub-zeolite structure was developed by pots-synthesis and applied to the epoxdiation of alkenes with hydrogen peroxide.A controlled acid treatment on the pure silica layered precursor PLS-3 of FER topology gave rise to a sub-zeolite ECNU-8.Composed of a collection of FER sheets without an ordered stacking manner along layer related[100]direction,the structure of ECNU-8 was constructed by a reorientation of interlayer hydrogen bond moieties caused by partial removal of interlayer organic structure directing agent.ECNU-8 possessed an external surface area enlarged by ca.30% in comparison to corresponding three-dimensional FER zeolite.Through a solid-gas reaction with TiCl4 vapor,tetrahedral Ti active sites were introduced into the framework.The resultant Ti-ECNU-8 retained the structural properties of ECNU-8,and exhibited an excellent catalytic performance for the epoxidation of cycloalkenes owing to the accessible Ti sites located in open reaction space.A titanosilicate Ti-ECNU-8 with a FER type sub-zeolite structure was developed by pots-synthesis and applied to the epoxdiation of alkenes with hydrogen peroxide.A controlled acid treatment on the pure silica layered precursor PLS-3 of FER topology gave rise to a sub-zeolite ECNU-8.Composed of a collection of FER sheets without an ordered stacking manner along layer related[100]direction,the structure of ECNU-8 was constructed by a reorientation of interlayer hydrogen bond moieties caused by partial removal of interlayer organic structure directing agent.ECNU-8 possessed an external surface area enlarged by ca.30% in comparison to corresponding three-dimensional FER zeolite.Through a solid-gas reaction with TiCl4 vapor,tetrahedral Ti active sites were introduced into the framework.The resultant Ti-ECNU-8 retained the structural properties of ECNU-8,and exhibited an excellent catalytic performance for the epoxidation of cycloalkenes owing to the accessible Ti sites located in open reaction space.

关 键 词：Sub-zeolite ECNU-8 Titanosilicate Epoxidation Layered zeolite 

分 类 号：O643.36[理学—物理化学]