期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 3, 期 3, 页码 1298-1305出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta05031b
关键词
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资金
- Catalysis Center for Energy Innovation (CCEI), an Energy Frontier Research Center
- US Dept of Energy, Office of Science, and Office of Basic Energy Sciences [DE-SC0001004]
- Chinese Scholarship Council (CSC) [201206150004]
Hierarchical ZSM-5 was directly synthesized by controlling the nucleation, growth and template-free self-assembly of zeolite precursors formed in the initial stage of the zeolite crystallization process. The facile synthesis results in spherical particles primarily composed of a micro-mesoporous core of aggregated 30-50 nm MFI nanocrystals, and a thin crystalline shell. MFI nanocrystal assembly coupled with a possible dissolution-crystallization mechanism results in a template-free route to broadly distributed mesopores and, thereby, a ca. 25 nm diffusion length in a micrometer-sized particle. The materials exhibit enhanced mass transport and superior catalytic activity for bulky molecules.
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