Data di Pubblicazione:
2007
Citazione:
Transformation of MCM-22(P) into ITQ-2: The role of framework aluminium / Frontera, P., F., T., R., A., S., C., J. B., N.. - In: MICROPOROUS AND MESOPOROUS MATERIALS. - ISSN 1387-1811. - 106:(2007), pp. 107-114.
Abstract:
The aim of this paper is to investigate systematically the formation of ITQ-2 from different MCM-22(P) materials.
Particular attention has been devoted to understanding how each delamination step influences the final ITQ-2 materials. In order to
characterize the intermediate products of the delamination steps, various types of analysis have been carried out: XRD, 27Al-, 29Si-, and
13C-MAS NMR, DSC-TG and chemical analyses. It has been confirmed that the delamination process is favoured by the decreasing
aluminium concentration of parent materials. The investigation carried out has shown that aluminium always remains in tetrahedral
coordination, in both the ITQ-2 and MCM-22 (P) phases probably because it is protected, during the delamination process, by the
organic cation used in the MCM-22(P) synthesis.
Particular attention has been devoted to understanding how each delamination step influences the final ITQ-2 materials. In order to
characterize the intermediate products of the delamination steps, various types of analysis have been carried out: XRD, 27Al-, 29Si-, and
13C-MAS NMR, DSC-TG and chemical analyses. It has been confirmed that the delamination process is favoured by the decreasing
aluminium concentration of parent materials. The investigation carried out has shown that aluminium always remains in tetrahedral
coordination, in both the ITQ-2 and MCM-22 (P) phases probably because it is protected, during the delamination process, by the
organic cation used in the MCM-22(P) synthesis.
Tipologia CRIS:
1.1 Articolo in rivista
Elenco autori:
Frontera, Patrizia; F., Testa; R., Aiello; S., Candamano; J. B., Nagy
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