Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5348732 | Applied Surface Science | 2015 | 10 Pages |
Abstract
- Vanadium was incorporated into Al-PILC using NaVO3 or VOSO4·3H2O precursors by wet impregnation, washing after wet impregnation and impregnation from solution methods.
- The layered structure of the supports was retained after the vanadium incorporation.
- Incorporation took place both by settling and ion exchange mechanism with the treatment VOSO4·3H2O precursor while settling was dominant in the use of NaVO3 precursor.
- Treatment with VOSO4·3H2O which was acidic in solution resulted in more structural deformation.
- V2O5 and VO2 were found as the major oxide forms on the impregnated samples. Loading of vanadyl sulfate hydrate (VOSO4·H2O) resulted in higher V/Si ratio. Most of the vanadium was bonded in +5 oxide form.
- Changes in the FTIR signals after vanadium incorporation caused by Brønsted and Lewis sites, silanol, water and vanadium vibrations were occured.
- Dehydroxylation of the structure took place around 300 °C. Samples obtained by impregnation and washing after wet impregnation methods resulted in similar mass losses and the wet impregnated sample showed the highest mass loss among the impregnated samples.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Suna Balci, Aylin Tecimer,