Synthesis and Properties of Mesoporous Silica-Alumina with Narrow Pore Size Distribution Obtained without Use of Pore-Regulating Agents

0055019 - UCHP-M 20060091 RIV NL eng J - Journal Article
Vít, Zdeněk - Šolcová, Olga
Synthesis and Properties of Mesoporous Silica-Alumina with Narrow Pore Size Distribution Obtained without Use of Pore-Regulating Agents.
[Syntéza a vlastnosti mezoporézního aluminosilikátu s úzkou distribucí pórů.]
Microporous and Mesoporous Materials. Roč. 96, 1-3 (2006), s. 197-204. ISSN 1387-1811. E-ISSN 1873-3093
R&D Projects: GA ČR(CZ) GA104/06/0870; GA ČR(CZ) GA104/04/0963
Institutional research plan: CEZ:AV0Z40720504
Keywords : mesoporous silica-alumina * hydrothermal stability * pore size distribution
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 2.796, year: 2006

The synthesis of mesoporous silica-alumina (MSA) from Na metasilicate and AL nitrate without pore-regulating agents is described. The pore structure is almost exclusively formed by mesopores of diameters 3 - 5 nm. From X-Ray diffraction, electron microscopy and 27Al MAS NMR it follows that the MSA is amorphous with disordered pore arrangement, with majority of the Al atoms in octahedral coordination. The pore size distribution is much narrower in comparison to distributions of commercial silica-aluminas. The textural properties are influenced to only minor extent by treatments in water and calcination up to 800?C.

Mezoporézní aluminosilikát MSA byl připraven z Na metasilikátu a dusičnanu hlinitého bez přídavku póry regulujících materiálů. Připravený monodisperzní materiál měl velmi úzkou distribuci pórů a vysoký specifický povrch. X-ray analýza potvrdila amorfnost materiálu s Al atomy v oktahedrální koordinaci.
Permanent Link: http://hdl.handle.net/11104/0142875