TY - JOUR
T1 - Self-formation of hierarchical micro-meso-macroporous structures
T2 - Generation of the new concept "Hierarchical Catalysis"
AU - Vantomme, Aurélien
AU - Léonard, Alexandre
AU - Yuan, Zhong Yong
AU - Su, Bao Lian
PY - 2007/6/1
Y1 - 2007/6/1
N2 - 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.
AB - 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.
KW - Formation mechanism
KW - Hierarchical catalysis
KW - Hierarchical porosity
KW - Micro-meso-macropores
KW - One pot reaction
KW - Self-formation
KW - Single catalyst
UR - http://www.scopus.com/inward/record.url?scp=34147147084&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfa.2007.01.010
DO - 10.1016/j.colsurfa.2007.01.010
M3 - Article
AN - SCOPUS:34147147084
SN - 0927-7757
VL - 300
SP - 70
EP - 78
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
IS - 1-2
ER -