Article ID Journal Published Year Pages File Type
580711 Journal of Hazardous Materials 2010 12 Pages PDF
Abstract
The purposes of this research were to study the effects of two modified photocatalysts, Nafion-coated TiO2 and fluorinated TiO2, and photocatalytic degradation of Victoria Blue R in aqueous solution. Photocatalytic degradation of Victoria Blue R was accelerated by the modified photocatalysts. Bulk and surface characterizations of the resulting powders were carried out. Attachment of the anions to the TiO2 surface using the Nafion-coated-TiO2 possibly results in increased adsorption of the cationic dye, and the degradation rate is larger for the cationic dye. It was found that Victoria Blue R on the two illuminated TiO2 surfaces underwent very different changes. To obtain a better understanding on the mechanistic details of this modified-TiO2-assisted photodegradation of the Victoria Blue R dye with UV irradiation, a large number of intermediates of the process were separated, identified, and characterized by a high-performance liquid chromatography-mass spectrometry technique. Several probable photodegradation pathways were proposed and discussed.
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Physical Sciences and Engineering Chemical Engineering Chemical Health and Safety
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