An effective promoting approach was described to modify the photoelectrochemical properties of rutile TiO2 by codoping with the nonmetal N and transition metal Ta ions, followed by loading with Fe2O3. Here, the charge compensated and coupled semiconductor systems were constructed, and their visible-light and persistent fluorescence assisted photocatalytic activities for NO destruction and CH3CHO removal were evaluated. The results demonstrated that both the charge compensation of TiO2 by co-doping with N3- and Ta5+ and loading with a proper amount of Fe2O3 facilitated the enhancement of both the visible-light and persistent fluorescence induced photocatalytic ability. The TiO2 co-doped with N3- and Ta5+ followed by loading with Fe2O3 excellently met the criteria for the persistent photocatalysts, which can be functional for environmental purification even after turning off lamp irradiation.
- Compensated codoping
- Persistent fluorescence assisted
ASJC Scopus subject areas
- Environmental Science(all)
- Process Chemistry and Technology