阴极共电沉积法制备Fe^(3+)掺杂TiO_2纳米薄膜及其可见光活性

Cathodic Co-electrodeposition of Fe^(3+)-doped TiO_2 Thin Films and Their Photocatalytic Activity under Visible Light

研究了阴极共电沉积制备Fe3+掺杂TiO2纳米薄膜(Fe-TiO2)的新方法．应用该方法、溶胶-凝胶法和浸渍法分别制备了具有可见光响应的Fe-TiO2光催化剂．并用XRD、SEM、EDS和UV-vis吸收光谱对Fe-TiO2进行了表征．结果表明,与溶胶-凝胶法和浸渍法相比共电沉积法不仅能有效地实现Fe3+在TiO2中的均匀分布,而且,得到的光催化剂具有最大的比表面积和最好的光降解活性．Rhodamine B(RhB)降解实验表明,在RhB光降解中存在光敏化和光催化降解的协同效应．

A novel cathodic co-electrodeposition （CCED） method for the preparation of Fe^3＋-doped TiO2 thin film （Fe-TiO2） was studied. The thin film photocatalysts of Fe-TiO2 containing different amounts of Fe^3＋ were prepared by the CCED, wet impregnation and sol-gel methods. The photocatalysts were characterized by X-ray diffraction analysis （XRD）, specific surface area measurements, SEM-EDS and UV-vis absorption spectra. In the three types of photocatalysts, the photocatalysts obtained by CCED not only have a more homogeneous distribution of Fe^3＋, but also have the largerst specific surface area and the photodegradation activity than those obtained by the other two. In addition, the experimental results show that there is a synergetic effect of photosensitization and photocatalytic in RhB degradation.