Mixed-phase TiO2 photocatalysts: Crystalline phase isolation and reconstruction, characterization and photocatalytic activity in the oxidation of 4-chlorophenol from aqueous effluents

- Anatase and rutile were isolated from Degussa (Evonik) P25 by selective dissolution.
- TiO2 powders were characterized by XRD, HRTEM, Raman and DR-UV-vis spectroscopies.
- First derivative DR-UV-vis spectroscopy was used to calculate the Eg of TiO2 phases.
- DR-UV-vis spectroscopy detected the presence of TiO2 impurities in the main phase.
- No synergistic effect was observed in the mixed-phase photocatalyts.