Article (Scientific journals)
Self-formation of hierarchical micro-meso-macroporous structures: Generation of the new concept "Hierarchical Catalysis"
Vantomme, A.; Léonard, Alexandre; Yuan, Z.-Y. et al.
2007In Colloids and Surfaces A: Physicochemical and Engineering Aspects, 300 (1-2 SPEC. ISS.), p. 70-78
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Keywords :
Self-formation; Hierarchical catalysis; Hierarchical porosity; Micro-meso-macropores; One pot reaction
Abstract :
[en] The self-formation phenomenon of hierarchy with multiple-scaled porosity is reported. The structures of various chemical compositions, such as ZrO2, TiO2, Al2O3, Y2O3, Nb2O5, Ta2O5 ZrO2-SiO2, ZrO2-TiO2, ZrO2-Y2O3, aluminosilicates, aluminophosphates, silicoaluminophosphates, metallophosphates, are made of macrochannels (0.5-5 μm in diameter) with mesoporous or microporous walls. The hierarchically porous structures are prepared by just controlling the hydrolysis and polycondensation rates of the pre-selected inorganic sources. The textural, structural as well as morphological properties of each material are carefully studied by using a large series of techniques, such as XRD, NMR, TEM, SEM, N2 adsorption-desorption, Hg porosimetry, optical microscopy. On the basis of these multimodal porous structures, a new concept "Hierarchical Catalysis" has been proposed. This new concept can allow the realisation of a multiple steps reaction in one single catalyst in a cascade way without any separation processes. © 2007 Elsevier B.V. All rights reserved.
Disciplines :
Materials science & engineering
Chemistry
Author, co-author :
Vantomme, A.;  Facultés Universitaires Notre-Dame de la Paix - Namur - FUNDP > Chimie > Chimie des Matériaux Inorganiques
Léonard, Alexandre  ;  Facultés Universitaires Notre-Dame de la Paix - Namur - FUNDP > Chimie > Chimie des Matériaux Inorganiques
Yuan, Z.-Y.;  Facultés Universitaires Notre-Dame de la Paix - Namur - FUNDP > Chimie > Chimie des Matériaux Inorganiques
Su, B.-L.;  Facultés Universitaires Notre-Dame de la Paix - Namur - FUNDP > Chimie > Chimie des Matériaux Inorganiques
Language :
English
Title :
Self-formation of hierarchical micro-meso-macroporous structures: Generation of the new concept "Hierarchical Catalysis"
Publication date :
2007
Journal title :
Colloids and Surfaces A: Physicochemical and Engineering Aspects
ISSN :
0927-7757
eISSN :
1873-4359
Publisher :
Elsevier, Netherlands
Volume :
300
Issue :
1-2 SPEC. ISS.
Pages :
70-78
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 07 January 2013

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