改性TiO2纳米管阵列电极的光电化学性能研究

近年来,掺杂改性的TiO₂纳米管作为光催化材料的研究受到广泛关注。本实验采用阳极氧化法在Ti板表面制备规则有序的TiO₂纳米管,通过在电解液中直接添加含Fe、N元素的化学试剂对其进行掺杂改性。利用扫描电子显微镜、X射线衍射仪和X射线光电子能谱对TiO2纳米管进行表征,确定TiO₂纳米管的最佳制备条件。最后利用瞬态光电流曲线、开路电位曲线、线性伏安扫描曲线对其光电化学性能进行比较。研究发现,1%的Fe元素掺杂材料具有更好的光电响应,光照时开路电位可达0.345 V;9%的N元素掺杂材料具有最好的光电活性,光照时开路电位可达0.3 V。

Study on Photoelectrochemical Performance of Modified TiO2 Nanotube Array Electrode

In recent years, the research of doped modified TiO₂ nanotubes as photocatalytic materials has received widespread attention. In this paper, anodic oxidation method is used to prepare regular and ordered TiO₂ nanotubes on the surface of Ti plate, and the chemical reagents containing Fe and N elements are directly added to the electrolyte to modify them. Sem, X-ray diffractometer and X-ray photoelectron spectroscopy were used to characterize TiO₂ nanotubes, and the optimal preparation conditions of TiO₂ nanotubes were determined. Finally, the transient photocurrent curve, open-circuit potential curve, and linear voltammetric scanning curve were used to compare their photoelectrochemical performance. The study found that 1% Fe element doped material has better photoelectric response, and the open circuit potential can reach 0.34V under light; 9% N element doped material has the best photoelectric activity, and open circuit potential can reach 0.317V.