A study on the active sites for visible-light photocatalytic activity of phosphorus-doped titanium(IV) oxide particles prepared using a phosphide compound

- Phosphorus-doped TiO2 was prepared by doping TiO2 with phosphorus having negative charges.
- The P-doped TiO2 nanoparticles contain oxygen vacancies.
- The visible-light activity of the P-TiO2 depended on P content.
- The correlation between densities of oxygen vacancies and visible-light activity was discussed.