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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.)

Photoelectrocatalytic Removal of Bromate Using Ti/TiO2 Coated as a Photocathode

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Author(s):
Monteiro Paschoal, Fabiana Maria [1] ; Pepping, Greg [2] ; Boldrin Zanoni, Maria Valnice [1] ; Anderson, Marc A. [2]
Total Authors: 4
Affiliation:
[1] Univ Estadual Paulista, Dept Quim Analit, Inst Quim, BR-14801970 Araraquara, SP - Brazil
[2] Univ Wisconsin, Environm Chem & Technol Prograrn, Madison, WI 53706 - USA
Total Affiliations: 2
Document type: Journal article
Source: Environmental Science & Technology; v. 43, n. 19, p. 7496-7502, OCT 1 2009.
Web of Science Citations: 41
Abstract

These studies represent the rare use of a TiO(2) material as a photocathode and the first application of photoelectrocatalysis for BrO(3)(-) removal. Photoelectrocatalytic reduction of BrO(3)(-) to Br(-) can reach 70% at neutral pH under an applied potential of -0.20 V versus SCE (saturated calomel electrode) after 75 min on the irradiated nanoporous thin-film TiO(2)-Coated working electrode, which presented a flat band potential of -0.0274 V versus SCE. Regardless of the potential applied in these experiments, no BrO(3)(-) removal was observed in the counter electrode compartment or during electrolysis or photocatalysis, confirming that reduction of BrO(3)(-) to Br(-) requires the combination of a negative potential (ideally near -0.20 V) and ultraviolet irradiation of the Ti/TiO(2) electrode. The process was selective for BrO(3)(-) removal in that this process did not ;significantly reduce levels of Ca(2+) and Mg(2+) in drinking waters. (AU)