Abstract
Four different aluminum compounds are examined as Al source in the hydrothermal synthesis of the mesoporous aluminosilicates of MCM-41 type, including pseudo boehmite, aluminum sulfate, aluminum isopropoxide and sodium aluminate. X-ray diffraction results show that there are differences in the d100 spacings for the samples prepared with different Al sources: sodium aluminate>Al isopropoxide>Al sulfate>pseudo boehmite. Such differences reveal that Al incorporation in the framework increases in the following order: pseudo boehmite<Al sulfate<Al isopropoxide<sodium aluminate. 27Al NMR and 29Si NMR reveal that most of the Al species in the samples prepared with pseudo boehmite are present in octahedral coordination.
Original language | English (US) |
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Pages (from-to) | 125-137 |
Number of pages | 13 |
Journal | Materials Research Society Symposium - Proceedings |
Volume | 454 |
State | Published - Dec 1 1997 |
Event | Proceedings of the 1996 MRS Fall Symposium - Boston, MA, USA Duration: Dec 2 1996 → Dec 5 1996 |
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering