Easy way to produce iron-doped titania nanoparticles via the solid-state method and investigation their photocatalytic activity

This study focuses on the synthesis of iron-modified TiO 2 nanoparticles “via solid-state” method with different iron content (0.5, 1, 1.5 and 2 wt%) using commercial titania Degussa P25 and TiO 2 synthesized (sTiO 2 ) via microemulsion method. The samples were characterized by SEM, BET and UV-Vis-DRS. The photocatalytic activity was evaluated in terms of methylene blue (MB) degradation in aqueous solution under visible radiation and under different conditions (pH, catalyst dosage, pollutant initial concentration, irradiance). The tests showed a big difference between sTiO 2 and Degussa 25. The sTiO 2 with an iron load of 1 wt% has been proven to be the best photocatalyst. This behavior is attributed to the Fe 3+ species in sTiO 2 crystal lattice whose presence decreases the bandgap.