Abstract
Silica alumina and silicoaluminophosphate-based molecular sieves were investigated by means of X-ray photoelectron spectroscopy. For all network elements, only one symmetrical peak of the binding energy was observed, indicating a very homogeneous distribution of the electron densities around the atoms throughout the lattice. Nevertheless, the strongest effects are related to the most nearest-neighbor environment. The binding energies of Si2p, O1s, and AI2p in silica alumina molecular sieves increased with increasing concentration of aluminum. Phosphorus decreases the binding energy of the oxygen without a large effect upon either aluminum or silicon. The implication of these observations for the polar properties of molecular sieve networks and their thermal stabilities are discussed.
Original language | English |
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Pages (from-to) | 81-85 |
Number of pages | 5 |
Journal | Zeolites |
Volume | 12 |
Issue number | 1 |
DOIs | |
State | Published - Jan 1992 |
Externally published | Yes |
Keywords
- XPS
- Zeolites
- binding energy correlations
- surface properties