Influence of the Al source and synthesis of ordered Al-SBA-15 hexagonal particles with nanostairs and terraces
Langmuir, ISSN: 0743-7463, Vol: 21, Issue: 5, Page: 2078-2085
2005
- 34Citations
- 32Captures
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Metrics Details
- Citations34
- Citation Indexes34
- 34
- CrossRef28
- Captures32
- Readers32
- 32
Article Description
We investigated the effect of various aluminum sources on the morphology and microstructure of nanoporous Al-SBA-15. With aluminum tri-sec-butoxide (Al-TSB), very large, ordered hexagonal rods of Al-SBA-15 covered by nanostairs and terraces were synthesized. Such a morphology was not obtained with an inorganic Al source (sodium aluminate) or with organic sources seemingly similar to Al-TSB, such as aluminum tri-tert-butoxide, aluminum tri-n-butoxide, or aluminum isopropoxide. The results obtained from X-ray diffraction, scanning electron microscopy/transmission electron microscopy, N adsorption/desorption, and high-performance Xe NMR suggest that preparing an organic Al-Si precursor by premixing liquid organic Al and Si sources (Al-TSB and tetraethyl orthosilicate) is crucial in obtaining highly ordered mesoporous Al-SBA-15 materials with a well-defined morphology. © 2005 American Chemical Society.
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