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http://hdl.handle.net/10553/46312
| Title: | Effect of Lewis acid centres and H2O2-complexes on the photocatalytic degradation of phenol | Authors: | Araña, J. Portillo-Carrizo, Dennis Ortega Méndez, J. A. Herrera-Melián, J. A. Doña Rodríguez, J. M. Pérez-Peña, J. González Díaz, O. |
UNESCO Clasification: | 330301 Tecnología de la catálisis | Keywords: | TiO2 Photocatalysis FTIR Mechanism H2O2, et al |
Issue Date: | 2012 | Project: | Water Detoxification Using Innovative vi-Nanocatalysts Modificación y Optimización de Catalizadores Basados en Materiales Altamente Fotoactivos Para Procesos Fotocatalíticos en Fase Acuosa y Gaseosa. |
Journal: | Journal of Photochemistry and Photobiology A: Chemistry | Abstract: | A Ti–H2O2–phenol complex, not described until now, has been identified on the surface of Degussa P-25 and the new catalyst ECT-1023. This complex is considered to be responsible for the higher hydroquinone to catechol concentration ratio. It has been also shown that phenolates identified on the surface modify electrodonation that controls the generation of activating positions of the aromatic ring. The different strengths of the Lewis acid centres identified provide phenolates with different electrodonation ability. It has been observed that P-25 has Lewis acid centres with stronger acid character than those of ECT-1023. Thus, the mechanism of phenol degradation is affected by the formation of complexes with H2O2 and the distribution and strength of Lewis acid centres of the studied catalyst. | URI: | http://hdl.handle.net/10553/46312 | ISSN: | 1010-6030 | DOI: | 10.1016/j.jphotochem.2012.09.002 | Source: | Journal of Photochemistry and Photobiology A: Chemistry [ISSN 1010-6030], v. 249, p. 61-69 |
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