JIA Di, YA Jing, FEI Xuening, LIU Yunzhao
（Tianjin Institute of Urban Construction）
Abstract: TiO2 photocatalysis materials were prepared by sol－gel method and some dye solutions with or without Fe3＋ were treated under solar ray. The results show that photocatalytic properties of TiO2 were improved when Fe3＋ was added to the dye solutionand its photocatalytic mechanism was discussed.
Key words: additionTiO2solar ray photocatalysisiron