【摘要】 采用Sol Gel法、浸渍 提拉法制备了RE(Sm,Dy,Lu)掺杂TiO2的锐钛矿晶型薄膜。用X射线衍射分析、UV Vis透射光谱及电化学实验对其进行了表征,通过对紫外光照射下甲基橙溶液的光催化降解评价了其光催化性能。结果表明,RE掺杂的TiO2薄膜的吸收光向长波方向移动;掺杂浓度是影响光催化活性的重要因素;适量RE掺杂可以明显提高TiO2薄膜的光催化性能;最佳掺杂浓度是0.5%。其中掺杂Sm样品的光催化活性最好。分别讨论了RE不同浓度及不同元素掺杂对TiO2光催化性能的影响机制。更多还原

【Abstract】 RE（Sm, Dy, Lu）-doped Anatase TiO₂ thin films were prepared by the sol-gel dip-coating method.The thin films were characterized by X-ray diffraction, UV-Vis spectroscopy and electrochemistry experiment. The photocatalytic activity of the thin films were evaluated by photocatalytic degradation of methyl orange under UV irradiation. The results show that Sm-doped TiO₂ thin films exhibit a shift of the UV-Vis absorption towards longer wavelengths. The doped contentration is an important factor for the photocatalytic activity. Appropriate amount of RE improved the photoctalytic activity of TiO₂ thin films obviously. The optimum RE contentration is about 0.5% Sm/TiO₂ shows the highest catalytic activity among all the RE/TiO₂ samples concerned.Influence mechanisms bringed in various doping concentration and elements were discussed respectively.更多还原