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Template removal from polycrystalline silicalite-1 self-supporting layer
- Source :
-
Materials Chemistry & Physics . Mar2005, Vol. 90 Issue 1, p116-122. 7p. - Publication Year :
- 2005
-
Abstract
- Abstract: The extent of thermal template (tetra-propyl-ammonium: TPA+) removal from a silicalite-1 layer by heating in air was investigated. While a temperature of 330°C was sufficient to eliminate all N-containing template species from the surface region of the layer (i.e., within a depth of ≉10nm), their complete elimination from the bulk even at 550°C was not achieved. This was caused by a series of reactions proceeding at high temperatures, involving the products of TPA+ thermal degradation. A substantial amount of C-containing template species remained in the sample even after a thermal treatment at 550°C. A role the SiO2 phase of low organization present in the silicalite-1 layer plays in the retention of the products of thermal degradation has been proposed. Additionally, the stability of TPA+ irradiated by microwaves was examined. Only minor morphological changes of the layer upon thermal template removal were revealed by atomic force microscopy. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 02540584
- Volume :
- 90
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Materials Chemistry & Physics
- Publication Type :
- Academic Journal
- Accession number :
- 19174856
- Full Text :
- https://doi.org/10.1016/j.matchemphys.2004.10.019