| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 46909 | Applied Catalysis B: Environmental | 2011 | 6 Pages |
In the search for the origin of the enhanced photocatalytic activity of composite TiO2–carbon systems, we have fabricated and analyzed well-defined model samples consisting of anatase and graphitic carbon with and without modifying the interface between them by a thin SiO2 space layer. The films with a TiO2/C interface show noticeably lower photoluminescence intensity and shorter carrier life times compared to single TiO2 films with the same thickness and composition. The stronger non-radiative recombination is mainly assigned to charge carrier leakage (transfer) at the interface between TiO2 nanocrystallites and the carbon film.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Designed and fabricated model photocatalyst systems of TiO2 and graphitic carbon. ► Charge carrier dynamics obtained from photoluminescence (PL) measurements. ► The higher photocatalytic activity is primarily related to charge carrier leakage.
