单一模板线性多胺一步合成多级孔ZSM-5沸石微球(英文)  

One-Step Synthesis of Hierarchical ZSM-5 Zeolite Microspheres Using Alkyl-Polyamines as Single Templates

作　　者：陈丽[1] 薛腾[1] 朱树燕[1] 王一萌[1] 

机构地区：[1]华东师范大学化学系,上海市绿色化学与化工过程绿色化重点实验室,上海200062

出　　处：《物理化学学报》2015年第1期181-188,共8页Acta Physico-Chimica Sinica

基　　金：supported by the National Natural Science Foundation of China(20890122);National Key Technology R&D Program of China(2012BAE05B02)~~

摘　　要：线性多胺模板剂(二乙烯三胺(DETA)、三乙烯四胺(TETA)、四乙烯五胺(TEPA))作为单一模板合成了均匀的10-15μm的多级孔沸石ZSM-5微球.实验发现,在水热过程中,50 nm纳米的沸石晶体粒子自发地堆积成微球,并且这些微球具有较大的介孔体积,在傅-克烷基化反应中具有高的催化活性.同时,我们发现线性多胺起到了模板剂和空隙填充剂的多重功能,这点明显不同于以前我们报道的线性二胺作为模板剂在合成ZSM-5沸石时,主要是起模板剂的作用.Diethylenetriamine （DETA）, triethylenetetramine （TETA）, and tetraethylenepentamine （TEPA） were used as single templates to synthesize mesoporous zeolite ZSM-5 microspheres. The obtained 10-15 IJm hierarchical aggregates had a uniform spherical morphology, which was spontaneously assembled by primary zeolite nanocrystals of 50 nm in size during the hydrothermal synthesis. The ZSM-5 aggregates had a tunable textual porosity, large mesopore volume, and high catalytic activity in the FriedeI-Crafts alkylation. Diamine templates only acted as structure directing agents in our previous work. The current alkyl-polyamine templates acted as structure directing agents and space fillers in the synthesis of the hierarchical zeolites.

关 键 词：多级孔沸石 聚集体 单一模板 线性多胺 

分 类 号：O643.36[理学—物理化学]