Preparation of High-Orderly TiO2 Nanotubes in Organic Solutions and characterization of C-doping of TiO2

摘要

High-orderly TiO2 nanotubes arrays were fabricated by anodic oxidation of pure titanium substrate in organic electrolyte containing fluoride. Different morphological nanotubes of titania were obtained through controlling the different anodization voltages and durations. The length of the longest nanotubes was approximately 60μm and a length-to-width aspect ratio was about 600. The nanotube layers were then annealed at different temperatures (450℃，550℃ and 650℃) in air for 2h. The samples were characterized by SEM,XRD,EDS and UV-VIS spectrometer. The X-ray diffraction demonstrated that the as-anodized samples are amorphous and the structure can change to antanse and rutile when they annealed at higher temperature. The EDS microanalysis indicated the presence of carbon in the TiO2 nanotubes. The result of degradation of methylene blue shown clearly that the activity of photocatalysis with C-doping TiO2 nanotubes increased by 10%.