Molecular and Meso- and Macroscopic Properties of Hierarchical Nanocrystalline ZSM-5 Zeolite Prepared by Seed Silanization.

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(Originalarbeit)


Details zur Publikation

Autorinnen und Autoren: Serrano DP, Aguado J, Morales G, Rodriguez JM, Peral A, Thommes M, Epping JD, Chmelka BF
Zeitschrift: Chemistry of Materials
Verlag: American Chemical Society
Jahr der Veröffentlichung: 2009
Band: 21
Heftnummer: 4
Seitenbereich: 641-654-654
ISSN: 0897-4756
eISSN: 1520-5002


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)]


Einrichtungen weiterer Autorinnen und Autoren

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Zitierweisen

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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