Critical influence of surface nitrogen species on the activity of N-doped TiO2 thin-films during photodegradation of stearic acid under UV light irradiation

- Nitrogen-doped TiO2 thin films synthesised by chemical vapour deposition.
- Surface nitrogen species as responsible for the enhanced UV activity of the films.
- Potential influence of surface species in the visible light activity of some N-TiO2 materials.