Study of phenol photodegradation with tio2/-wo3 coupled semiconductors activated by visible light

• H GÓMEZ ^[1] ; F ORELLANA ^[1] ; H LIZAMA ^[1] ; H. D. MANSILLA ^[2] ; E.A. DALCHIELE ^[3]
  1. [1] Pontificia Universidad Católica de Valparaíso

     Pontificia Universidad Católica de Valparaíso

     Valparaíso, Chile

     
  2. [2] Universidad de Concepción

     Universidad de Concepción

     Comuna de Concepción, Chile

     
  3. [3] Universidad de la República

     Universidad de la República

     Uruguay

     

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• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 51, Nº. 4, 2006, págs. 1006-1009
• Idioma: inglés
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• Resumen

  • The photo-degradation of phenol was studied employing the TiO2/WO3 semiconductors coupled, activated with visible light.Results show that the photo-degradation efficiency depends on the mixture composition. The best performance was found with aTiO2/-6% WO3 mixture that presented a photo-degradation that was 20 times greater than for TiO2/ commercial alone. This behavior is explained in terms of the increase in the hydrophilic character of the coupled semiconductors, the improvement in the kinetics of separation of the electron/hole pair through the transfer of cationic holes towards the valence band of TiO2/ and, the formation of W(V)species in WO3