论文部分内容阅读
采用化学溶胶-凝胶法制备TiO2溶胶,用浸渍-提拉方式在陶瓷表面制成锐钛矿相TiO2薄膜。用X射线衍射法(XRD)确定了晶型及晶粒的大小;用光电子能谱测定了其微观成分及其含量;考察了7种过渡金属离子掺杂后对甲基橙降解的光催化性能的影响及其变化规律,并对陶瓷和玻璃的光催化活性进行了比较。实验结果表明:掺杂Mn及Ni离子对于提高TiO2薄膜的光催化活性有明显的促进作用,降解30min后,降解率分别达到79.7%,80.8%。瓷片和玻璃的光催化活性要视掺杂的金属离子而定,不同的掺杂离子对瓷片和玻璃的光催化活性有不同的作用效果。
The TiO2 sol was prepared by chemical sol - gel method and the anatase TiO2 film was formed on the ceramic surface by impregnation - pulling. The crystal form and grain size were determined by X-ray diffraction (XRD). The microscopic composition and content of the crystal were determined by photoelectron spectroscopy. The photocatalytic performance of methyl orange after degradation by 7 transition metal ions The influence and the law of its change, and compares the photocatalytic activity of ceramic and glass. The experimental results show that the doping of Mn and Ni ions can promote the photocatalytic activity of TiO2 thin film obviously, and the degradation rate reaches 79.7% and 80.8% respectively after 30min degradation. The photocatalytic activity of the ceramic and glass depends on the doped metal ions, and different doping ions have different effects on the photocatalytic activity of the ceramic and the glass.