Fabrication of Films of Co Doped TiO2Nanotube Array and their Phot℃atalytic Reduction Performance

作者：Wang, Shiqi; Huo, Wenyi; Xu, Zhengchao; Zhang, Xuhai; Zhou, Xuefeng; Fang, Feng^*

来源：Chinese Journal of Materials Research, 2020, 34(3): 176-182.

DOI：10.11901/1005.3093.2019.373

• Atomic fractions
• Effect of CO
• Inorganic non-metallic materials
• Photocatalytic reduction
• Preferred orientations
• TiO2 nanotube arrays
• Visible light
• Visible-light irradiation

Films of Ti-Co alloy were firstly prepared on ITO glass by magnetron sputtering and then were anodized in electrolyte of ethylene glycol + DI water + NH4F to produce films of the Co-doped TiO2 nanotube arrays. The effect of Co doping on the morphology, microstructure, optical and photocatalytic reduction performance under visible light was assessed for the acquired films. The results show that the films of Co-doped TiO2 nanotube arrays are composed of anatase, the same as the plain TiO2, while the preferred orientation changed to (001) from (101) of the plain TiO2. The incorporation of Co improved the absorption of visible light and promoted the separation of photo-generated electro-hole pairs simultaneously. Compared to the film of plain TiO2, the ones of Co-doped TiO2 nanotube arrays exhibit better photocatalytic reduction performance. The film with 0.19%Co (atomic fraction) shows the best photocatalytic reduction efficiency, it is 98.4% after visible light irradiation for 150 min.

• 单位
  东南大学