Visible-Light Photocatalysis in Nitrogen-Doped Titanium Oxides¶
Why this mattered¶
TBD
Abstract¶
To use solar irradiation or interior lighting efficiently, we sought a photocatalyst with high reactivity under visible light. Films and powders of TiO 2- x N x have revealed an improvement over titanium dioxide (TiO 2 ) under visible light (wavelength < 500 nanometers) in optical absorption and photocatalytic activity such as photodegradations of methylene blue and gaseous acetaldehyde and hydrophilicity of the film surface. Nitrogen doped into substitutional sites of TiO 2 has proven to be indispensable for band-gap narrowing and photocatalytic activity, as assessed by first-principles calculations and x-ray photoemission spectroscopy.
Related¶
- cite → Electrochemical Photolysis of Water at a Semiconductor Electrode — Asahi et al. extend Fujishima and Honda's TiO2 photoelectrochemical water-splitting work by nitrogen-doping TiO2 to shift photocatalytic activity into visible light.
- enables ← Electrochemical Photolysis of Water at a Semiconductor Electrode — Fujishima and Honda's TiO2 photoelectrochemical water-splitting work established semiconductor photocatalysis, which nitrogen-doped TiO2 extended into visible-light activation.