Effects of heat treatment scheme on the photocatalytic activity of TiO2 nanotube powders derived by a facile electrochemical process

▶ Rapid preparation of TiO2 nanotube powder by an anodization processing. ▶ Effects of heat treatment schemes on the photocatalytic activities are checked out carefully. ▶ TiO2 nanotube powder shows different crystalline phases under the same temperature. ▶ The optimal temperatures for the best photocatalytic activities are identified.