Preparation and Characterization of Nanotitanium Dioxide Coating Film Doped with Fe3+ Ions on Porous Ceramic
The nanotitanium dioxide (TiO2) photocatalytic and porous ceramic filtering technique is one of the advanced methods to effectively treat organic wastewater. The TiO2 sol doped with Fe3+ ions was prepared by sol-gel processing. The influences of the process conditions of coating nanophotocatalytic material-Fe3+-TiO2 film on the surface of porous ceramic filter by dipping-lift method on the performance of porous ceramic filter were studied. The porous ceramic filters have two functions at the same time,filtration and photocatalytic degradation. The results of this study showed that the pH and viscosity of the sol,amount of Fe3+ ions doped as well as the coating times greatly affect the quality of coating film,the performance parameters and the photocatalytic activity of the porous ceramic filter. When the pH of the sol is 3-4,the viscosity is about 6 mPa·S,the amount of doped Fe3+ ions is about 2.0 g/L,the porous ceramic filter has been shown to have the best filtering performance and photocatalytic activity. In this condition,the porosity of porous ceramic is about 42.5％,the pore diameter is 8-10μm. The degradation of methyl-orange is 74.76％ under lighting for 120 min.
作 者： Kejing Xu 作者单位： Shandong University of Technology,Department of Materials Science and Technology,Zibo 255049,China 刊 名： 天然气化学(英文版) ISTIC SCI 英文刊名： JOURNAL OF NATURAL GAS CHEMISTRY 年，卷(期)： 2005 14(3) 分类号： O6 关键词： nanometer Fe3+ TiO2 film porous ceramic filter photocatalysis organic wastewater