Methylene blue degradation under visible irradiation on TiO2 electrodes sensitized by dye chlorophyll extract from Spinacia Olera/Degradación de azul de metileno bajo irradiación visible sobre electrodos de TiO2 sensibilizados con pigmentos de clorofila..

William Andres Vallejo
Carlos Diaz
Maria Alvis
Alvaro Cantillo
Catalina Fajardo


DOI: http://dx.doi.org/10.15665/rp.v16i2.1455

Resumen


En este trabajo se evaluó la actividad fotocatalítica de pigmentos fotosintéticos (clorofila), adsorbidos sobre superficie de dióxido de titanio en presencia de luz visible, los pigmentos fueron extraídos por maceración en frío,  a partir de plantas de espinaca (Spinacia Olerace), la fabricación de las películas de TiO2 fue realizada utilizando la técnica de Doctor Blade, la cuantificación de los pigmentos se realizó mediante el método tricromático según la norma estandarizada para la cuantificación de clorofila 10200 H. Los pigmentos fijados sobre la superficie de TiO2 aumentaron la respuesta de este material en el rango visible, finalmente se evaluó la capacidad  fotocatalítica del TiO2 modificado bajo irradiación visible,  la degradación del azul de metileno se evaluó durante 140 minutos, obteniendo un porcentaje de degradación de los electrodos modificados fue superior al de los electrodos de TIO2 sin modificar.


Palabras clave


Fotocatálisis; TiO2; Sensibilización; Clorofila.

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Referencias


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