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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/39642
Title: 
Degradation of metallophtalocyanine dye by combined processes of electrochemistry and photoelectrochemistry
Author(s): 
Institution: 
  • Universidade Estadual Paulista (UNESP)
  • CETESB Cia Tecnol Saneamento Ambiental
  • Univ Wisconsin
ISSN: 
0013-4686
Abstract: 
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.
Issue Date: 
5-Sep-2005
Citation: 
Electrochimica Acta. Oxford: Pergamon-Elsevier B.V., v. 50, n. 25-26, p. 5261-5269, 2005.
Time Duration: 
5261-5269
Publisher: 
Elsevier B.V.
Keywords: 
  • cooperphtalocyanine dye
  • photoelectrocatalytic oxidation
  • Ti/TiO2 electrodes
Source: 
http://dx.doi.org/10.1016/j.electacta.2005.01.058
URI: 
Access Rights: 
Acesso restrito
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/39642
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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