钇掺杂有序多孔TiO_2薄膜的制备与可见光催化性能

Preparation and Visible-Light Photocatalysis Property of Yttrium-Doped Ordered Porous TiO_2 Thin Films

采用胶体晶体薄膜为模板,利用溶胶–凝胶法制备了钇掺杂有序多孔TiO2薄膜,通过Fourier变换红外光谱、扫描电子显微镜、X射线衍射、X射线光电子能谱、紫外–可见光谱表征样品的结构和形貌,并以甲基橙为模型化合物研究了钇掺杂有序多孔TiO2薄膜材料可见光催化性能。结果表明:钇掺杂有序多孔TiO2薄膜规整致密,晶型为锐钛矿型,样品中钇元素含量约为1.2%。钇掺杂使得TiO2吸收光红移至可见光区,钇掺杂有序多孔TiO2薄膜可见光催化性能好于未掺杂有序多孔TiO2薄膜。

A yttrium-doped ordered porous TiO2 thin film was prepared by a sol–gel and colloidal crystals template method.The morphology structure of the film was characterized by Fourier transform infrared spectroscopy（FTIR）,scanning electron microscopy（SEM）,X-ray diffraction（XRD）,X-ray photoelectron spectroscopy（XPS） and UV–Vis analysis,respectively.The photocatalysis property was also investigated.The results show that the yttrium-doped ordered porous TiO2 thin film is compact and ordered,but has some collapse of pores.The anatase form of porous TiO2 thin film was not changed by yttrium-doped treatment.The XPS analysis indicated that yttrium-doped TiO2 thin film could be prepared,and the content of yttrium element was 1.2%.The UV–Vis analysis showed that the yttrium-doped TiO2 thin film red-shifted into the visible region.The degradation of methyl orange result revealed that the visible-light photocatalysis property of yttrium-doped TiO2 was better than that of the pure TiO2.