Revista U.D.C.A Actualidad & Divulgación Científica
versión impresa ISSN 0123-4226
LEGUIZAMON, Juliana; QUINONES, César; ESPINOSA, Hilda y SARRIA, Víctor. TiO2 PHOTOSENSIBILIZATION WITH A COMMERCIAL DYE FOR PHOTODEGRADATION OF ORGANIC WATER POLLUTANTS. rev.udcaactual.divulg.cient. [online]. 2010, vol.13, n.2, pp. 185-190. ISSN 0123-4226.
In this study, the photosensitization of TiO2 semiconductor with a commercial dye in order to increase its catalytic properties was explored. The following parameters were evaluated: the dye concentration used on the sensitization, the semiconductor sensitization time, the amount (unit: mol) of the dye, adsorbed on the semiconductor and the radiation absorption shift on the modified catalyst towards the visible spectrum region. Finally, the photocatalytic activity of the modified catalyst through the degradation of a pollutant model (phenol) was tested. A removal efficiency of 33.85 per cent of the initial concentration of phenol, compared to 18.98 per cent using unmodified TiO2 was obtained. Photosensitization of TiO2 with commercial dyes appears to be a technically and economically feasible alternative, which can be adopted as an option to increase the photocatalytic properties of TiO2.
Palabras llave : TiO2; sensitization; phthalocyanines; direct blue 199.