Preparation Gd/N-Codoped TiO₂ Photocatalyst to Remove TOC in Power Plant Boiler Make-Up Water

A series of Gd/N codoped nanoTiO2photocatalyst were synthesized to remove TOC in Power plant Boiler Make-up Water. The catalysts were prepared by sol–gel method and characterized by the means of XRD, TEM and UV-Vis DRS. Compared with pure TiO2, the catalytic activity of the nanocomposite photo-catalyst was improved significantly. The experiment results show that the optimum amounts of Gd and N-codoped TiO2photocatalysts were 0.5 wt.% and 5mol %, respectively. Under the UV irradiation for 5 h at pH 3.0, the photocatalytic effect could be as high as 88% and the TOC removal efficiency was 81%, which indicates that photodegradation and mineralization of HA are synchronous, the two results correlate well.