Fig. 2From: Regulating the surface of anion-doped TiO2 nanorods by hydrogen annealing for superior photoelectrochemical water oxidationa Schematics depicting the investigation point of the TiO2 nanorods. The edge of the square-shaped nanorod, having the (110) plane as the side plane, was determined to clarify the exact crystallographic state of the surface. b TEM and HRTEM images of S, N-doped TiO2 nanorods annealed under air at 350 °C and H2 at 600 °C, respectivelyBack to article page