Synthesis of high surface area boria-alumina mixed oxides characterizationby B-11- and Al-27-NMR

Authors
Dumeignil, F Guelton, M Rigole, M Amoureux, JP Fernandez, C Grimblot, J
Citation
F. Dumeignil et al., Synthesis of high surface area boria-alumina mixed oxides characterizationby B-11- and Al-27-NMR, COLL SURF A, 158(1-2), 1999, pp. 75-81
Citations number
29
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
ISSN journal
09277757 → ACNP
Volume
158
Issue
1-2
Year of publication
1999
Pages
75 - 81
Database
ISI
SICI code
0927-7757(19991110)158:1-2<75:SOHSAB>2.0.ZU;2-Q
Abstract
Boria-alumina mixed oxides were synthesized by the sol-gel method. MAS-NMR spectroscopy spectra exhibited two boron species, BO3 and BO4, the former g iving an important second order quadrupolar effect. Then, spectra were inte rpreted with a simulation software which permitted quantitative evaluation of boron species in both dried and calcined states. Tetrahedral Al species formed in the dried state appear to monitor BO4 and BO3 species formation i n both dried and calcined states. (C) 1999 Elsevier Science B.V. All rights reserved.