Photocatalytic Hydrogen or Oxygen Evolution from Water over S- or N-Doped TiO₂ under Visible Light

Figure 4

Amount of evolved O₂ from water containing Fe³⁺ ions as electron acceptors on S-doped TiO₂ having rutile phase (NS-51), N-doped TiO₂ having rutile phase (NS-51), and N-doped TiO₂ having anatase phase (ST-01).