Behavior of bromide in the photoelectrocatalytic process and bromine generation using nanoporous titanium dioxide thin-film electrodes

• Published in: Chemosphere (Oxford) Vol. 54; no. 7; pp. 969 - 974
• Main Authors: Selcuk, Huseyin, Sene, Jeosadaque J., Zanoni, Maria Valnice B., Sarikaya, Hasan Z., Anderson, Marc A.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.02.2004; Elsevier
• Subjects: Applied sciences; Bromides - chemistry; Bromine - chemistry; Bromine generation; Catalysis; Drinking water and swimming-pool water. Desalination; Electrochemistry; Electrodes; Exact sciences and technology; Hydrogen-Ion Concentration; Kinetics; Photoelectrocatalytic; Pollution; Titanium; Titanium dioxide; Water treatment and pollution; Bromine generation; Electrodes; Titanium dioxide; Photoelectrocatalytic; Drinking water treatment; Bromine; Pollutant behavior; Photocatalysis; Nanoporous materials; Photochemical reaction; Porous material; Operating conditions; Electrocatalysis; Ultraviolet radiation; Thin layer electrode; Bromides; Reaction mechanism; Electrochemical reaction; Titanium oxide
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2003.09.016

In this study, the photoelectrocatalytic behavior of bromide and generation of bromine using TiO 2 was investigated in the separate anode and cathode reaction chambers. Our results show that the generation of bromine begins around a flatband potential of −0.34 V vs. standard calomel electrode (SCE) at pH 3.0 under UV illumination and increases with an increase in positive potential, finally reaching a steady-state concentration at 1.0 V vs. SCE. Maximum bromine formation occurs over the range of pH 4–6, decreasing sharply at conditions where the pH > 7.