Preparation of Cr‐doped TiO2/SiO2 Photocatalysts and their Photocatalytic Properties |
| |
Authors: | Rufen Chen Huating Liu |
| |
Institution: | College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, Hebei 050016, P. R. China |
| |
Abstract: | Cr‐doped TiO2/SiO2 nanostructured materials were prepared employing a layer‐by‐layer assemblym technique. TiO2 colloids were synthesized by a sol‐gel method using TiCl4 as a precursor. The experimental results showed that sphere‐type TiO2 particles on SiO2 exhibited uniform shape and a narrow size distribution. The amount of Ti (wt %) increased as a function of the number of the coating layers. The coatingv layers was composed of anatase titania nanocrystals at 550 °C. The onset of band‐gap transition for Crdoped TiO2/SiO2 showed a red shift compared with that for the undoped TiO2/SiO2. And the photocatalytic activity of Cr‐doped TiO2/SiO2 was higher than that of undoped sample. |
| |
Keywords: | TiO2/SiO2 Layer‐by‐layer assembly Cr‐doped Photocatalytic activity |
|
|