利用溶胶-电泳沉积技术,以多孔有序阳极氧化铝膜为模板制备Nd~(3+)/F~-共掺杂的二氧化钛纳米线阵列.用扫描电子显微镜、X射线衍射仪对其进行表征,并以甲基橙为降解物,对Nd~(3+)单掺杂TiO_2、F~-单掺杂TiO_2和Nd~(3+)/F~-共掺杂TiO_2进行了光催化降解性能研究.结果表明:Nd~(3+)/F~-共掺杂TiO_2纳米线阵列具有比单元素掺杂更高的光催化活性,光照1 h对甲基橙的降解率均达到90%以上.同时,杂质离子的引入使得TiO_2薄膜的吸收波长发生红移,实现了在不降低TiO_2光催化性能的同时又具有可见光活性.
Titania nanowire arrays were synthesized in highly ordered porous anodic alumina template by Sol-gel electrophoretic method.The samples were characterized by SEM and XRD. The photocatalytic properties of Nd~(3+)/TiO_2，F~-/ TiO_2 and Nd~(3+)/F~-/TiO_2 nanowire arrays were characterized by degradation of methyl orange solution. The results show that Nd~(3+)/F~-/TiO_2 nanowire arrays exhibit higher photocatalytic activity than that of Nd~(3+)/TiO_2 and F~-/ TiO_2 nanowire arrays. For Nd~(3+)/F~-/TiO_2 nanowire arrays，the degradation rate of methyl orange exceeds 90% after 1 h irradiation. At the same time，the absorption wavelength of TiO_2 film shifts red with the addition of impurity ions, indicating that the nanowire arrays exhibit some photocatalytic activity in visible spectrum.
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