Abstract
Homogeneous single phase sol-gels of magnesia and alumina were prepared using magnesium and aluminum alkoxides as precursors. The gels were formed through a hydrolysis reactions followed by condensation. These materials behave as basic catalysts and, therefore, are superb anionic interchangers. The solids obtained were characterized by infrared spectroscopy, thermogravimetric analysis and anionic interchange tests. No evidence for the presence of the individual binary oxides was found. An important effect on the dehydroxylation of the surface and on the anionic exchange was found as a function of alumina content in the magnesia matrix. The best sample was the one containing 50% MgO-50% Al2O3.
Original language | English |
---|---|
Pages (from-to) | 325-334 |
Number of pages | 10 |
Journal | Materials Letters |
Volume | 32 |
Issue number | 5-6 |
DOIs | |
State | Published - Oct 1997 |
Externally published | Yes |
Keywords
- Anionic interchange
- Basic catalysts
- Homogeneous single phase
- Infrared
- Sol-gel
- System (AlO-MgO)
- TGA