Photocatalytic water splitting on TiO₂
Switch on the UV lamp: a photon with hν ≥ Eg = 3.2 eV lifts an electron from the valence to the conduction band of TiO₂. The electron reduces H⁺ to H₂; the hole left behind oxidises water to O₂.
Switch on the UV lamp: a photon with hν ≥ Eg = 3.2 eV lifts an electron from the valence to the conduction band of TiO₂. The electron reduces H⁺ to H₂; the hole left behind oxidises water to O₂.