Insertion of Gallium Oxide into α-Titanium Phosphate Using a Surfactant Expanded Phase as Precursor
✍ Scribed by J. Jiménez-Jiménez; P. Maireles-Torres; A. Jiménez-López; E. Rodrı́guez-Castellón
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 250 KB
- Volume
- 147
- Category
- Article
- ISSN
- 0022-4596
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✦ Synopsis
Intercataled gallium oxide in -titanium phosphate materials can be synthesized using a swelled phase such as cetyltrimethylammonium titanium phosphate as precursor. This is prepared in a single step by hydrolysis of titanium iso-propoxide with phosphoric acid via a supramolecular long-range ordered organic species acting as a template, which by cationic exchange with gallium oligomers and ulterior calcination at 823 K gives rise to mesoporous solids. These materials exhibit high speci5c surface areas close to 150 m 2 g ؊1 , high acidity predominantly of the Lewis type, which are active as catalysts in the conversion of the 2-propanol dehydration reaction at 493 K with conversions ranging between 50 and 83%, and total selectivities for propene.