On the application of nanostructured electrodes prepared by Ti/TiO2/WO3 "template": A case study of removing toxicity of indigo using visible irradiation

Author(s)

Guaraldo, Thais T. ; Zanoni, Thalita B. ; de Torresi, Susana I. C. ; Goncales, Vinicius R. ; Zocolo, Guilherme J. ; Oliveira, Danielle P. ; Zanoni, Maria Valnice B.

• Document type: Journal article
• Source: Chemosphere; v. 91, n. 5, p. 8-pg., 2013-04-01.

Abstract

New assays with HepG2 cells indicate that Indigo Carmine (IC), a dye that is widely used as additive in many food and pharmaceutical industries exhibited cytotoxic effects. This work describes the development of a bicomponent nanostructured Ti/TiO2/WO3 electrode prepared by "template" method and investigates its efficiency in a photoelectrocatalytic method by using visible light irradiation and applied potential of 1 V. After 2 h of treatment there are reduction of 97% discoloration, 62% of mineralization and formation of three byproducts assigned as: 2-amine-5-sulfo-benzoic acid, 2,3-dioxo-14-indole-5-sulfonic acid, and 2-amino-alpha-oxo-5-sulfo-benzeneacetic acid were identified by HPLC-MS/MS. But, cytotoxicity was completely removed after 120 min of treatment. (c) 2013 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 08/10449-7 - Assessment of occurrence, toxicity/genotoxicity and degradation processes of dyes in effluents and surface water
• Grantee: Maria Valnice Boldrin
• Support Opportunities: Research Projects - Thematic Grants