TiO 2 with “Fluorine‐Occupied” Surface Oxygen Vacancies and Its Stably Enhanced Photocatalytic Performance

Oxygen vacancies have a positive effect on the photocatalytic performance of TiO 2 , but their benefits are deeply limited owing to their inherent lability. To avoid this disadvantage, fluorine atoms were used to “occupy” the surface oxygen vacancies (O vacancies) of TiO 2 . The “fluorine‐occupied” surface O vacancies maintain the intrinsic nature of the O vacancies, but they are stable under ambient and photocatalytic conditions. TiO 2 with “fluorine‐occupied” surface O vacancies give enhanced performance in terms of both photodegradation and photocurrent conversion. The “occupied” strategy used herein holds promise to be a common method for developing O vacancy‐related photocatalysts.