Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 17, Issue 51, Pages 14618-14627Publisher
WILEY-BLACKWELL
DOI: 10.1002/chem.201101401
Keywords
aldol condensations; heterogeneous catalysis; kinetics; surface chemistry; surfactants; zeolites
Categories
Funding
- National Natural Science Foundation of China [20633090, 20703055, 50872140, 50702072]
Ask authors/readers for more resources
By kinetic control over the zeolite seed formation, we report the direct fabrication of hierarchical mesoporous zeolites using hexadecyl trimethyl ammonium bromide (CTAB) as the soft template in a conventional solution route. Nanometer-sized, subnanocrystal-type zeolite seeds with a high degree of polymerization are essential to prevent the formation of a separate amorphous mesoporous phase and the phase separation between the mesophase and zeolite crystals in the presence of CTAB and a certain amount of ethanol. The mechanisms for the formation of hierarchically porous zeolites in the solution process, including the effect of mother liquid aging, formation of subnanocrystal zeolite seeds and their self-assembly effect with CTAB, and the role of ethanol are proposed and discussed in detail. The prepared mesoporous ZSM-5 zeolite showed much higher catalytic activity than conventional counterparts for aldol condensations involving large molecules, especially in the synthesis of vesidryl.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available