The synthesis of nitrogen/sulfur co-doped TiO(2) nanocrystals with a high specific surface area and a high percentage of {001} facets and their enhanced visible-light photocatalytic performance

Nitrogen/sulfur co-doped anatase TiO(2) nanocrystals with a high specific surface area and a high percentage of {001} facets were synthesized by a solvent-thermal process followed by the calcination with thiourea at an optimum heat treatment temperature. Under current experimental conditions, the optimum heat treatment temperature was found at 300°C, which successfully introduced nitrogen and sulfur dopants into the anatase lattice to replace a small portion of oxygen atoms while preserving the geometry of these anatase TiO(2) nanocrystals to maintain a high percentage of {001} facets. These nitrogen/sulfur co-doped anatase TiO(2) nanocrystals demonstrated a largely enhanced light absorption in the whole visible-light range and exhibited much higher photocatalytic performance than both P25 TiO(2) nanoparticles and anatase TiO(2) nanocrystals with a high percentage of {001} facets under visible-light illumination.