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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Enhanced photoabsorption properties of composites of Ti/TiO2 nanotubes decorated by Sb2S3 and improvement of degradation of hair dye

Full text
Author(s):
Bessegato, Guilherme Garcia [1] ; Cardoso, Juliano Carvalho [1] ; da Silva, Bianca Ferreira [1] ; Boldrin Zanoni, Maria Valnice [1]
Total Authors: 4
Affiliation:
[1] Univ Estadual Paulista, UNESP, Inst Quim, Dept Quim Analit, BR-14800060 Araraquara, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY; v. 276, p. 96-103, FEB 15 2014.
Web of Science Citations: 25
Abstract

The present work illustrates the great potentiality of Ti/TiO2/Sb2S3 composite electrode prepared by electrochemical anodization of Ti foil in aqueous electrolyte (1 mol L-1 NaH2PO4 + 0.3 wt.% HF followed by chemical bath deposition of Sb2S3) in environmental electrochemistry. The electrodes are characterized by deposits of particles of 500 nm of diameter formed on the top of TiO2 nanotubes of 900 nm of length, 110 nm of diameter and 13 nm of wall thickness. The band gap obtained for Ti/TiO2/Sb2S3 composite electrode was 1.68 eV, contributing to strong photoabsorption properties of the material in the visible light region (lambda <740 nm). The photocurrent on this material is remarkably improved in relation to that obtained on comparable nanotubes TiO2 films. The electrodes promote complete degradation of the investigated hair dyeing commercialized as ArianorTyrian Purple (R) after 120 min of photoelectrocatalytic oxidation under potential of 1.2V and commercial light irradiating under UV/Visible light. Finally, the degradation products generated by photoelectrocatalysis were analyzed by HPLC-MS/MS. (C) 2013 Elsevier B.V. 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
FAPESP's process: 12/18357-0 - Study of photoeletrocatalytic degradation of cosmetic dyes with TiO2 nanotube electrodes undoped and doped Sb2S3
Grantee:Guilherme Garcia Bessegato
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)