Incorporation of tungsten into MCM-41 framework
| Autor: | V. Riede, Olaf Klepel, Helmut Papp, Winfried Böhlmann, E.B. Ivanov |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Chemistry
Thermal desorption spectroscopy Oxide Analytical chemistry chemistry.chemical_element General Chemistry Tungsten Condensed Matter Physics chemistry.chemical_compound symbols.namesake Chemical engineering MCM-41 Transition metal Mechanics of Materials X-ray crystallography symbols General Materials Science Spectroscopy Raman spectroscopy |
| Zdroj: | Microporous and Mesoporous Materials. 76:105-112 |
| ISSN: | 1387-1811 |
| Popis: | The incorporation of tungsten into the framework of Si-MCM-41 is described. The synthesis was carried out under basic conditions avoiding the formation of polymeric tungsten species, which can lead to extra framework oxide species. The textural and structural properties of the obtained materials have been investigated by XRD and low temperature nitrogen adsorption. The state of the tungsten species has been elucidated by means of XRD, 29 Si MAS NMR, UV–VIS spectroscopy, Raman spectroscopy, and temperature programmed desorption (TPD) of ammonia. An incorporation of tungsten into the framework of MCM-41 was successful by using ammonium (meta) tungstanate as the tungsten source. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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