Influence of the Structure of Hydrothermal-Synthesized TiO Nanowires Formed by Annealing on the Photocatalytic Reduction of CO in HO Vapor.

The present study investigates the photocatalytic properties of hydrothermally synthesized TiO nanowires (NWs) for CO reduction in HO vapor. It has been demonstrated that TiO NWs, thermally treated at 500-700 °C, demonstrate an almost tenfold higher yield of products compared to the known commercial powder TiO P25. It has been found that the best material is a combination of anatase, TiO-B and rutile. The product yield increases with increasing heat treatment temperature of TiO NWs. This is associated with an increase in the degree of crystallinity of the material. It is shown that the best product yield of the CO reduction in HO vapor is achieved when the TiO NW photocatalyst is heated to 100 °C.