ZSM-5/SBA-15 microporous/mesoporous composites prepared by a microwave-assisted zeolitisation of Al-SBA-15 mesoporous solids
| Autor: | Venčeslav Kaučič, Sami Habib, Antoine Gédéon, Dalil Brouri, Patricia Beaunier, Franck Launay, Henri El Zakhem, Matjaž Mazaj, Nataša Novak Tušar, Flavien Guenneau |
|---|---|
| Přispěvatelé: | University of Balamand - UOB (LIBAN), Laboratoire de Réactivité de Surface (LRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), National Institute of Chemistry, Laboratoire de Chimie de la Matière Condensée de Paris (site Paris VI) (LCMCP (site Paris VI)), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), University of Balamand [Liban] (UOB) |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Nanoparticle Ammonium fluoride 02 engineering and technology 010402 general chemistry 01 natural sciences C. Electron microscopy C. Nuclear magnetic resonance Catalysis chemistry.chemical_compound Hydrothermal synthesis General Materials Science Composite material Mechanical Engineering D. Catalytic properties Sorption Microporous material A. Microporous materials [CHIM.CATA]Chemical Sciences/Catalysis 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences A. Oxides chemistry Mechanics of Materials ZSM-5 0210 nano-technology Mesoporous material |
| Zdroj: | Materials Research Bulletin Materials Research Bulletin, Elsevier, 2013, 48, pp.1288-1295. ⟨10.1016/j.materresbull.2012.12.030⟩ Materials Research Bulletin, 2013, 48, pp.1288-1295. ⟨10.1016/j.materresbull.2012.12.030⟩ |
| ISSN: | 0025-5408 1873-4227 |
| Popis: | International audience; ZSM-5/SBA-15 composites with high textural properties were synthesised by a microwave-assisted zeolitisation of Al-SBA-15 in the presence of tetrapropylammonium bromide. The effect of the hydrothermal treatment temperature and of ammonium fluoride, often used as a catalyst, was studied. Resulting materials were characterised by XRD, SEM, N2 sorption, HR-TEM, hyperpolarised Xe NMR, pyridine sorption as well as by their stability toward boiling water. It was shown that the hydrothermal synthesis has to be carried out at 140 °C in order to better preserve the structure of the mesoporous precursor. Composite materials could be obtained only from a fluoride-free synthesis at short crystallisation times, t < 5 h. Appearance of 2-5 nm nanoparticles in some of the corresponding samples, has been related to the increase in the total acidity. Inclusion of zeolitic material in the remaining Al-SBA-15 structure was demonstrated by hyperpolarised xenon NMR studies. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect