Fig. 6From: Regulating the surface of anion-doped TiO2 nanorods by hydrogen annealing for superior photoelectrochemical water oxidationNanostructure of S, N-doped TiO2 nanorod arrays annealed under H2 atmosphere at 350 °C, selected as the optimum H2 treatment condition. a Planar view obtained by FESEM. Cross-sectional view is also displayed by inset image. b Planar view investigated by STEM and c corresponding EDS elemental mapping resultsBack to article page