Degradation of metallophtalocyanine dye by combined processes of electrochemistry and photoelectrochemistry

Nenhuma Miniatura disponível



Título da Revista

ISSN da Revista

Título de Volume


Elsevier B.V.


Photoelectrocatalytic degradation of metallophtalocyanine reactive dye (turquoise blue 15) was performed using a Ti/TiO2 thin film photoanode prepared by sol-get method. Hundred percent of color removal and almost complete mineralization (95% at pH 2 and 85% at pH 8) where achieved after 6 h of photolectrocatalytic oxidation of 2.5 x 10(-5) mol L-1 AT15 dye in Na2SO4 mol L-1 under E = +1.2 V versus SCE. The method limitation occurs at dye concentration higher than 4 x 10-5 mol L-1, where the degradation rate becomes markedly slower. An important improvement in color removal and TOC reduction for 1 x 10(-3) mol L-1 metallophtalocyanine dye was achieved using a combined process. After 4 h of potential controlled electrolysis at -1.2 V on a cathode of platinum followed by 6 h of photoelectrocatalytic oxidation leads to 100% of color removal and 83% of TOC decay and eletrodeposition of 69% of the released copper originally presented as copperphtalocyanine complex, by electrodeposition on the cathode without any other treatment. (C) 2005 Elsevier Ltd. All rights reserved.



cooperphtalocyanine dye, photoelectrocatalytic oxidation, Ti/TiO2 electrodes

Como citar

Electrochimica Acta. Oxford: Pergamon-Elsevier B.V., v. 50, n. 25-26, p. 5261-5269, 2005.