Preparation and photocatalytic properties of Fe-doped TiO_2 nanoparticles

摘要

Nanocrystalline Fe-doped TiO_2 with size of 60 - 70 nm was prepared by a sol-gel technique, followed by freeze-drying treatment for 2 h. Thermogravlmetric and differential thermal analyses, X-ray diffraction, scanning electron microscope, laser diffraction particle size analyzer and UV-Vis spectrophotometer technologies were used to characterize the product. The photocatalytic activities of the samples were evaluated by the degradation of wastewater of paper-making. The effects of Fe ion implantation on the photocatalytic activity of TiO_2 were also discussed. The results show that the iron content plays an essential role in affecting the photocatalytic activity of the Fe-doped TiO_2 and the optimum content of Fe-doped is 0.05% (mass fraction). The photocatalytic activity of samples with lower content of Fe-doped is higher than that of pure TiO_2 in the treatment of paper-making wastewater. The photo-degradation effect of paper-making effluent is the best by means of Fe-doped TiO_2 with 0.05% Fe.