| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 46638 | Applied Catalysis B: Environmental | 2012 | 7 Pages |
Uniform and adhesive TiO2 nanotube arrays (TiO2-NTAs) have been prepared by a two-step anodization in ethylene glycol solution containing NH4F. The UV-light-activity of TiO2-NTAs prepared by changing the electrolytic voltage and calcination temperature was studied for the degradation of 2-naphthol. Further, the surface of TiO2-NTA has been modified with iron oxide species at a molecular scale by the chemisorption–calcination cycle technique. The iron oxide-surface modification endows TiO2-NTA with a high level of visible-light-activity, concomitantly increasing the UV-light-activity. Under optimum conditions, the iron oxide-surface modified TiO2-NTA exhibits a UV-light-activity comparable with that of highly active TiO2 particles (P-25, Degussa).
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► TiO2 nanotube arrays (NTA) were formed by a two-step anodization on Ti plate. ► The TiO2-NTA shows a UV-light-activity comparable with that of TiO2 particles. ► The surfaces of TiO2-NTA were modified with molecular iron oxides. ► The iron oxide-surface modification significantly increases the UV-light-activity. ► The iron oxide-surface modification causes a high level of visible-light-activity.
