Preparation of TiO<sub>2</sub> Nanotubes by Ionic Liquid Assisted Anodic Oxidation Method

Abstract

Anodic oxidation in situ preparation of titanium matrix TiO2 nanotube and optimize the preparation process parameters. With the help of X-ray diffraction (XRD) analysis and scanning electron microscopy (SEM) technology we characterized the light catalyst that we have prepared. By oxidation degrading methylene blue, we tested its light catalytic activity. The result showed that the TiO2 nanotube maded at 20 V anodizing voltage, ionic liquids (2 ml), ammonium fluoride (0.684 g), ethylene glycol volume (200 ml) and water volume (6 ml)after 20 h, after dried for 30 min under 105 oC and annealed for 1 h under 500 oC in air became anatase phase, and the ratio of rutile phase is very low. The TiO2 nanotube arrays we made under the above condition for the degradation of methylene blue are good. The average diameter of a nanotube is about 90 nm, and the average thickness of a nanotube’s rampart is about 10 nm.