Highly Active Rutile TiO Nanocrystalline Photocatalysts.

The controllable synthesis of rutile TiO single crystal particles with the preferential orientation of {111} facets still remains a scientific and technological challenge. Here, we developed a facile route for fabrication of rutile TiO nanorod crystals (RTiONRs) having high ratios of oxidative {111} to reductive {110} surfaces. RTiONRs were synthesized using a peroxo-titanium complex (PTC) approach, which was controlled by changing the Ti/HO ratio. The thus obtained RTiONRs revealed a high tendency to agglomerate through orientation-dependent attachment along the {110} facets. This resulted in an increased {111}/{110} surface ratio and led to a markedly improved photocatalytic activity of RTiONR aggregates. The reported findings illustrate the rich potential of the herein proposed facile and energy-efficient synthesis of nanostructured rutile TiO-based photocatalysts.