Fabrication and Photocatalytic Property of One-Dimensional SrTiO₃/TiO_2−𝑥N_𝑥 Nanostructures

Figure 4

UV-vis absorption spectra of the uncalcined ((a): 0%; (b): 1%; (c): 2%; (d): 5%) and calcined ((e): 0%; (f): 1%; (g): 2%; (h): 5%) samples with different Sr/Ti ratios.