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handle: 10261/81774
[ES] En este trabajo se muestra la fotodegradación de azul de metileno (MB) sobre TiO2 en presencia de carbón activados (AC). Se emplearon dos tipos diferentes de lámparas y los resultados se compararon contra los obtenidos sobre TiO2 comercial. La constante aparente de velocidad de primer orden para la degradación de MB fue mayor en presencia de AC en comparación a la obtenida sobre el TiO2 solo y mucho mayor bajo irradiación con luz visible. Se puede concluir que el TiO2 aumenta su fotoactividad en un factor de hasta 8.7 veces mayor en la degradación de MB en presencia de AC. Este aumento fue asociado con las propiedades superficiales de cada AC.
[EN] Photodegradation of methylene blue (MB) on TiO2 in presence of activated carbons (AC) was studied. Two different lamps were employed and results were compared against those obtained on a commercial TiO2. Apparent first order rate constant for the degradation of MB was higher in presence of any AC in comparison of TiO2 alone but much higher under visible light irradiation. It can be concluded that TiO2 enhances its photoactivity by a factor up to 8.7 in the degradation of MB in presence of AC and this increase was associated with the surface properties of AC.
J. Matos thanks to the Venezuelan Ministery of Science and Technology for the funds given to perform this research.
Peer reviewed
Fotodegradación, Methylene blue, Activated carbon, Photodegradation, Azul de metileno, TiO2, Carbones activos
Fotodegradación, Methylene blue, Activated carbon, Photodegradation, Azul de metileno, TiO2, Carbones activos
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