Fabrication of visible-light active TiO_2 nanotubular layers by electrochemical processes and their characterization

本工作探索了阳极二氧化钛纳米管层晶化和二氧化钛纳米管层氮掺杂的新工艺。并对所制备的二氧化钛纳米管层进行了表征。两步阳极氧化后，纳米管层内未发生晶化，而在有机电解液中高温阳极氧化导致了阳极二氧化钛纳米管的部分晶化。含氮钛合金阳极氧化制备的掺氮纳米管薄膜具有可见光催化活性。

The present work explores new processes for the crystallization of anodic TiO_2 nanotube layers and the nitrogen-doping into TiO_2 nanotube layers. TiO_2 nanotube layers prepared are also characterized. After the two-step anodization nocrystallization takes place within nanotube layers whereas anodization in organic electrolytes at elevated temperatures leads to the partial crystallization of anodic TiO_2 nanotubes. Nitrogen-doped TiO_2 nanotube layers formed by anodization of nitrogen containing Ti alloys exhibit visible light photocatalytic activities.