Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 110, Issue 2-3, Pages 232-241Publisher
ELSEVIER
DOI: 10.1016/j.micromeso.2007.06.010
Keywords
mesoporous alumina; SBA-15; aluminum grafting; oxide support; surface chemical properties
Ask authors/readers for more resources
Mesoporous aluminas of controlled pore sizes were synthesized by multiple grafting of Al isopropoxide in organic solvents on mes- oporous silica SBA-15. These materials were characterized by N-2 physisorption, TEM, XRD Al-27 NMR and their surface chemical properties were probed by DRIFT, cumene cracking and MoO3 thermal spreading. The results show that the chemical nature of the Al-grafted materials varies continuously with the number of grafting from pure silica to pure alumina. Typically, after three graftings, this original method of synthesis allows one to prepare ordered mesoporous aluminas with specific surface areas above 300 m(2) g(-1) and a narrow pore size distribution centered on ca. 60 angstrom. In addition to the characterizations, different models were developed to understand the evolution of the specific surface area and to discard a possible pore blocking. (C) 2007 Elsevier Inc. All rights reserved.
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