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 research, anodic oxidation method was used to prepare regular and ordered TiO2 nanotubes on the surface of Ti plate, and the chemical reagents containing Fe and N elements were directly added to the electrolyte to modify TiO2 nanotubes. 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 photo- electrochemical performance. The results show that 1% Fe element doped material has better photoelectric response, and the open circuit potential can reach 0.345 V under light; 9% N element doped material has the best photoelectric activity, and open circuit potential can reach 0.3 V. © 2021, Science Press. All right reserved.