期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 1, 期 44, 页码 13821-13827出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta12989f
关键词
-
资金
- National Basic Research Program of China [2010CB732306]
- National Natural Science Foundation of China [21273071, 21101063]
- Fundamental Research Funds for the Central Universities
The sole presence of relatively small micropores in zeolite catalysts strongly influences the mass transfer and catalytic conversion of bulky molecules. Herein, we report a novel synthesis route for the confined synthesis of hierarchical MFI zeolite microspheres with nanorod oriented-assembled structures for the first time via the hydrothermal crystallization of a carbon-silica composite monolith. The growth of such unique zeolite microspheres undergoes a reversed crystal-growth route. Crystallization started on the outer surface of the amorphous particles, then extended to the core and finally resulted in nanorod oriented-assembled structures, due to the confined-space effect of carbon in the carbon-silica monolith. The novel hierarchical zeolite microspheres (5-10 mu m), including Silicalite-1, ZSM-5 and TS-1, composed of oriented-assembled nanorods (50-100 nm in width) are easy for separation and have inter-crystalline mesoporous networks between the nanorods; the latter are favourable for mass transfer. More importantly, the hierarchical zeolite microspheres Hier-ZSM-5 and Hier-TS-1 show much higher catalytic activities for bulky substrate conversion than the conventional ZSM-5 and TS-1, respectively. Thus, the novel hierarchical zeolite microspheres reported here show a great potential for industrial applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据