Photocatalytic oxidation of gaseous ammonia over fluorinated TiO2 with exposed (0Â 0Â 1) facets

- Surface fluorinated TiO2 (F-TiO2) had the remarkable activity for PCO of NH3.
- Surface fluorination formed the surface Ti-F group.
- Surface fluorination increased the reactive (0 0 1) facets percentage to about 50%.
- Both Ti-F group and reactive (0 0 1) facets led to the high activity of F-TiO2.
- Surface Ti-F group plays the dominant role in enhancing the PCO of NH3 activity.