Non-hydrolytic sol-gel synthesis of mesoporous iron-aluminum oxide and their properties in the oxidation of hydrocarbons by hydrogen peroxide
[EN] Iron-containing alumina materials were prepared by the non-hydrolytic sol-gel method in the presence of surfactants and their use as catalysts in the oxidation of hydrocarbons was studied. The solids were mesoporous, with large specific surface areas, > 250 m2 /g for the solids treated at 50...
| Autores: | , , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Universidad de Salamanca (USAL) |
| Repositorio: | GREDOS. Repositorio Institucional de la Universidad de Salamanca |
| OAI Identifier: | oai:gredos.usal.es:10366/159438 |
| Acceso en línea: | http://hdl.handle.net/10366/159438 |
| Access Level: | acceso abierto |
| Palabra clave: | Porous iron-alumina Oxidation reactions Heterogeneous catalysts Surfactants assisted synthesis 2303 Química Inorgánica |
| Sumario: | [EN] Iron-containing alumina materials were prepared by the non-hydrolytic sol-gel method in the presence of surfactants and their use as catalysts in the oxidation of hydrocarbons was studied. The solids were mesoporous, with large specific surface areas, > 250 m2 /g for the solids treated at 500 ◦C, depending on the surfactant used (cetyltrimethylammonium bromide, sodium dodecyl sulfate or hexadecylamine), and the calcination treatment applied (500 or 1000 ◦C). Iron was well distributed on the alumina surface, as confirmed by the EPR signals at 4.3 and 2.0 G and SEM imaging. The catalytic activity in the oxidation of cyclooctene, cyclohexane, and n-hexane was evaluated. After reaction for 48 h, the solid prepared with cetyltrimethylammonium bromide and calcined at 1000 ◦C showed a 25% conversion of cyclohexane with 51% selectivity to cyclohexanone. These were promising results, considering the mild reaction conditions, using a non-polluting oxidant at room temperature or 50–55 ◦C. |
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