Figure 2From: The synthesis of nitrogen/sulfur co-doped TiO2 nanocrystals with a high specific surface area and a high percentage of {001} facets and their enhanced visible-light photocatalytic performanceMorphological evolution of T3, T4, and T5. (a, b) TEM and HRTEM images of sample T3, respectively. (c, d) TEM images of samples T4 and T5, respectively.Back to article page