Effect of Ti content in the photocatalytic behavior of Fe/TiO2-SiO2 systems
In this work we report the synthesis of Fe/TiO 2 -SiO 2 systems with different concentrations of TiO 2 in order to determine the influence of titanium content on the structural, textural, optical properties and their photocatalytic behavior. The materials were synthesized by the sol-gel method and t...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2013 |
| País: | México |
| Institución: | Universidad Nacional Autónoma de México |
| Repositorio: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:57030970026 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=57030970026 |
| Access Level: | acceso abierto |
| Palabra clave: | Física, Astronomía y Matemáticas Fe TiO2 SiO2 photocatalysis semiconductors |
| Sumario: | In this work we report the synthesis of Fe/TiO 2 -SiO 2 systems with different concentrations of TiO 2 in order to determine the influence of titanium content on the structural, textural, optical properties and their photocatalytic behavior. The materials were synthesized by the sol-gel method and their modification was carried out by incipient impregnation. All samples were characterized by means of X ray diffraction, N 2 physisorption (BET method), DR-UV-Vis and Raman spectroscopy. The modifications of the structural and optical properties are discussed on the basis of long-range order reduction, suggesting the formation of highly dispersed TiO 2 species. On the other hand, it was observed that the energy of the optical band gap decreases by introducing Fe. On the basis of these phenomena, the photocatalytic activity was measured, employing the degradation of orange II azo dye as a model reaction. |
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