Synthesis and characterization of hollow zeolite microspheres with a mesoporous shell by O/W/O emulsion and vapor-phase transport method

被引：29
作者：
Cheng, Jifang
Pei, Supeng
Yue, Bin [1 ]
Qian, Linping
He, Chunxia
Zhou, Yan
He, Heyong
机构：
[1] Fudan Univ, Dept Chem, Shanghai 200433, Peoples R China
来源：
MICROPOROUS AND MESOPOROUS MATERIALS | 2008年 / 115卷 / 03期
基金：
中国国家自然科学基金;
关键词：
hollow sphere; O/W/O emulsion; vapor-phase transport; zeolite; ZSM-5;
D O I：
10.1016/j.micromeso.2008.02.009
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Hollow microspheres of ZSM-5 with a mesoporous shell have been synthesized through formation of amorphous hollow SiO2/AlO3 microspheres by sol-gel process in multiple oil-water-oil emulsions and transformation of the amorphous species into zeolite by water-organic vapor-phase transport treatment at 160 degrees C for 8 days. The morphology of the amorphous and zeolite spheres observed by scanning electron microscopy shows no significant change whereas the molar ratio of Si/Al increases from 6 to 20 during the transformation. The structural feature of zeolite was characterized by X-ray diffraction and Si-29 and Al-27 magic-angle spinning nuclear magnetic resonance. Transmission electron microscopy and N-2 adsorption-desorption isotherms indicate that uniform mesopores in the shell of zeolite spheres arise from the interstices among zeolite crystallites. (c) 2008 Elsevier Inc. All rights reserved.
引用
收藏
页码：383 / 388
页数：6
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