A facile method for the preparation of black TiO(2) by Al reduction of TiO(2) and their visible light photocatalytic activity

Black TiO(2) has attracted widespread attention due to its visible light absorption and wide range of applications. However, the currently reported preparation methods for black TiO(2) are not suitable for large-scale production due to its being prepared under high vacuum and over a long time. We have successfully prepared black TiO(2) under normal pressure and short time conditions. The as-prepared black titanium dioxide was characterized by XRD, XPS, TEM, UV-visible absorption spectrum and other characterization methods. The result shows that the as prepared black titanium dioxide had a disordered structure and oxygen vacancy defects on the surface, and exhibits excellent visible and near infrared absorption performance. The black TiO(2) sample was prepared under 650 °C 60 min exhibits excellent visible light photocatalytic performance, and can degrade 56% MO after visible light irradiation for 120 min.