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用阳极氧化法制备多孔状的纳米晶二氧化钛薄膜 ,通过往阳极氧化的电解液中添加Fe3+ ,使其进入二氧化钛薄膜中 ,研究了掺杂Fe3+ 对二氧化钛薄膜吸收光谱和光催化活性的影响。在阳性氧化时通过往电解液中添加不同含量的Fe3+ 可以制得掺杂Fe3+ 浓度不同的薄膜 ,研究了掺杂Fe3+ 浓度不同对薄膜吸收光谱和光催化活性的影响。用X射线衍射、扫描电子显微镜、紫外 可见吸收光谱仪和X光电子能谱对薄膜进行了表征。实验发现掺杂Fe3+ 使二氧化钛薄膜对入射光的吸收带边发生红移 ,讨论了其作用机制。
The porous nanocrystalline titania films were prepared by anodic oxidation. The effects of Fe3 + on the absorption spectra and photocatalytic activity of the titania films were investigated by adding Fe3 + into the anodized electrolyte. In the positive oxidation by adding different concentrations of Fe3 + into the electrolyte can be doped with different concentrations of Fe3 + film was studied doping Fe3 + concentration on the absorption spectra and the photocatalytic activity of the film. The films were characterized by X-ray diffraction, scanning electron microscopy, UV-Vis absorption spectroscopy and X-ray photoelectron spectroscopy. It is found that Fe3 + doping redox shifts the edge of the absorption band of incident light on the TiO2 film. The mechanism of action is discussed.