Efecto de las variables de síntesis sobre la actividad fotocatalítica de la titania (TiO2)

R. CORNEJO; E. M. FARFÁN TORRES; O. ALEMAN; V. MURGIA; G. MORALES; E. L. SHAM

Santa Fe

Congreso; 14º SAM -CONAMET; 2014

UNL

The photocatalytic properties of titanium oxide synthesized by sol - gel, were evaluated in the photo assisted reaction of an artificial dye?s (tartrazine) degradation. The reagent?s order of addition effect in the synthesis was studied: 1_ hydrolyzing medium on precursor and precursor on the hydrolyzing medium. Solids were calcined at 300, 500 and 700 °C and were characterized by differential thermal analysis, X-ray diffraction and electronic microscopy. The study on the influence of reagent?s order of addition and thermal treatment on the catalytic behavior of the solid obtained show that the best catalytic activity is obtained by adding the hydrolyzing medium on the precursor and calcining at 500 ° C. The explanation to this reactivity can be attributed to the species formed initially that have an influence on the secondary polycondensation reactions, which in turn affect morphology and the crystal structure of the resulting solids.