Preparation of N-doped TiO2: characterization and photocatalytic performance under UV and visible light
Abstract
Nanocrystalline N-doped TiO2 samples were prepared by using TiCl4 or TiOSO4 as precursors. The powders were characterized by
Some samples were more active than commercial Degussa P25. A shift of the absorption edge to a lower energy and a stronger absorption in the visible light region were observed in the samples obtained from TiCl4. Two absorption edges were observed in the samples derived from TiOSO4 and calcined at 400 °C: the main edge due to TiO2 and the second one due to the presence of a localised midgap band that induces the visible light activity.
- This article is part of the themed collection: Celebrating the centenary of the Italian Chemical Society