Visible Light Photoelectrochemical Properties of N-Doped TiO₂ Nanorod Arrays from TiN

Figure 6

XPS spectra of the N 1s core level obtained from the as-prepared TiN, 5 N-TiO₂ NRAs, 15 N-TiO₂ NRAs, and 120 N-TiO₂ NRAs, respectively.