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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.)

Influence of the morphology and microstructure on the photocatalytic properties of titanium oxide films obtained by sparking anodization in H3PO4

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Author(s):
Sikora, Mariana de Souza [1] ; Rosario, Adriane Viana [1] ; Pereira, Ernesto Chaves [1] ; Paiva-Santos, Carlos O. [2]
Total Authors: 4
Affiliation:
[1] Univ Fed Sao Carlos, DQ, Lab Interdisciplinar Eletroquim & Ceram LIEC, BR-13565905 Sao Carlos, SP - Brazil
[2] UNESP, Inst Quim, Lab Computac Anal Cristalograf & Cristalinas, LabCACC, BR-14800900 Araraquara, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Electrochimica Acta; v. 56, n. 9, p. 3122-3127, MAR 30 2011.
Web of Science Citations: 15
Abstract

The aim of this paper is to investigate changes in morphology and microstructure of TiO(2) films, prepared by sparking anodization of Ti in a H(3)PO(4) solution, by applying different formation charges. We show that although films obtained by this technique are rarely used in photocatalytic applications, the morphological and microstructural changes during sparking anodization produce TiO(2) films that can be used as photocatalysts. In contrast to qualitative analysis commonly found in the literature, we used quantitative methods of analysis to quantify average pore diameter and pore density from the morphology and structural parameters from X-ray diffraction (XRD) patterns using the Rietveld refinement. The results indicated that changes in both the morphology and crystalline structure have a strong influence on the photoactivity of the films. From this investigation, we concluded that, for films prepared in early stages of anodization, the morphology had the biggest influence on photoactivity, and after applying 72C of charge, crystalline properties dominated the photocatalytic characteristics of the films. (C) 2011 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 08/00180-0 - Investigation of the growth mechanism of porous TiO2 films prepared by galvanostatic anodization
Grantee:Mariana de Souza Sikora
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)