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Title: Photocatalytic degradation of phenolic compounds with new TiO2 catalysts
Authors: Araña, J. 
Doña-Rodríguez, J.M. 
Portillo-Carrizo, Dennis Alexandre
Fernández Rodríguez, Cristina 
Pérez Peña, Jesús 
González-Díaz, Oscar M. 
Navío, J. A.
Macías, M.
UNESCO Clasification: 2307 Química física
3308 Ingeniería y tecnología del medio ambiente
221001 Catálisis
Keywords: Photocatalysis
Phenolic compounds
Issue Date: 2010
Project: Modificación y Optimización de Catalizadores Basados en Materiales Altamente Fotoactivos Para Procesos Fotocatalíticos en Fase Acuosa y Gaseosa. 
Water Detoxification Using Innovative vi-Nanocatalysts 
Journal: Applied Catalysis B: Environmental 
Abstract: New TiO2 catalysts have been synthesised by means of a sol–gel method in which aggregates have been selected before thermal treatment. Sieving and calcination temperature have been proved to be key factors in obtaining catalysts with greater photoactivity than that of Degussa P-25. These new catalysts have been characterized by means of transmission electron microscopy (TEM), BET surface area, diffuse reflectance spectroscopy (DRS), UV–vis spectroscopy, Fourier transformed infrared (FTIR) and X-ray diffraction (XRD). The different parameters studied were compared to those obtained from two commercial catalysts (Degussa P-25 and Hombikat-UV100). The photocatalytic efficiency of the new catalysts was evaluated by the degradation of various phenolic compounds using UV light (maximum around 365 nm, 9mW). The catalyst sieved and calcinated at 1023 K, ECT-1023t, showed phenol degradation rates 2.7 times higher than those of Degussa P-25. Also in the degradation of different phenolic compounds, this catalyst showed a higher activity than that of the commercial one. The high photoactivity of this new catalyst has been attributed to the different distribution of surface defects (determined from FTIR studies) and its increased capacity to yield H2O2
ISSN: 0926-3373
DOI: 10.1016/j.apcatb.2010.08.011
Source: Applied Catalysis B: Environmental [ISSN 0926-3373], v. 100 (1-2), p. 346-354
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