Molecular and Meso- and Macroscopic Properties of Hierarchical Nanocrystalline ZSM-5 Zeolite Prepared by Seed Silanization.
Serrano DP, Aguado J, Morales G, Rodriguez JM, Peral A, Thommes M, Epping JD, Chmelka BF (2009)
Publication Type: Journal article, Original article
Subtype: other
Publication year: 2009
Journal
Publisher: American Chemical Society
Book Volume: 21
Pages Range: 641-654-654
Journal Issue: 4
DOI: 10.1021/cm801951a
Abstract
Surface-passivating silanization of protozeolitic units has been shown to be an effective strategy for the prepn. of ZSM-5 nanocrystals, showing a controlled aggregation degree and a hierarchical porosity. ZSM-5 zeolite materials are thus obtained with adjustable and relatively uniform mesoporosities that have a strong influence on resulting macroscopic reaction properties, esp. for macromol. reagents. The mean sizes of the nanounits and, therefore, the textural and accessibility of these materials can be varied by changing the precrystn. conditions and the concn. of the seed-silanization agent. In addn. to conventional characterization techniques, solid-state two-dimensional (2D) NMR spectroscopy measurements and the application of the NLDFT model to the argon adsorption isotherms have allowed both the local and the mesoscopic compns., as well as the structures of the hierarchically porous ZSM-5 materials, to be established. The resulting combination of mesopore sizes and exterior-nanocrystal surface properties of the hierarchically structured ZSM-5 zeolites is shown to catalyze reactions that are otherwise limited by steric and/or diffusional limitations, as demonstrated by their enhanced activity for polyethylene cracking. [on SciFinder(R)]
Authors with CRIS profile
Involved external institutions
Universidad Rey Juan Carlos
Spain (ES)
University of California
United States (USA) (US)
Quantachrome Instruments
United States (USA) (US)
Spain (ES)
University of California
United States (USA) (US)
Quantachrome Instruments
United States (USA) (US)
How to cite
APA:
Serrano, D.P., Aguado, J., Morales, G., Rodriguez, J.M., Peral, A., Thommes, M.,... Chmelka, B.F. (2009). Molecular and Meso- and Macroscopic Properties of Hierarchical Nanocrystalline ZSM-5 Zeolite Prepared by Seed Silanization. Chemistry of Materials, 21(4), 641-654-654. https://dx.doi.org/10.1021/cm801951a
MLA:
Serrano, D. P., et al. "Molecular and Meso- and Macroscopic Properties of Hierarchical Nanocrystalline ZSM-5 Zeolite Prepared by Seed Silanization." Chemistry of Materials 21.4 (2009): 641-654-654.
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