| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 149139 | Chemical Engineering Journal | 2012 | 8 Pages |
In this study, Bi2O3 with band gap energy of 2.6 eV was coated on a Ti disk and used in a rotating disk reactor to treat 10 mg L−1 Rhodamine B (RB) solution under UV and visible light irradiation. The effects of different inorganic anions (including CO32-, S2−, SO42-, F− and Cl−) were investigated and the results shown that the color removal efficiency could be greatly improved in the presence of Cl−. RB adsorption capacity could be enhanced when Cl− was added and RB could further be degraded due to indirect dye self-photosensitization under visible light irradiation. The radicals generated during the reaction were detected by adding radical trapping agents and other experimental conditions like Cl− concentration, rotating speed and pH of the process were investigated and optimized.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► RB was degraded using Bi2O3/Ti rotating disk reactor under visible light irradiation. ► Effects of different inorganic anions F-,Cl-,S2-,CO32-,SO42- were investigated. ► RB adsorption capacity could be enhanced in the presence of Cl−. ► RB removal efficiency was greatly enhanced due to indirect dye photosensitization. ► The large amount of Cl− in tap water could also be utilized to degrade RB.
