Plasmonic gold-silver alloy on TiO2 photocatalysts with tunable visible light activity

- Visible light response of Au-Ag alloy on TiO2 photocatalysts can be well predicted.
- The visible light response is accurately tunable through the alloy composition.
- Photocatalytic stearic acid degradation is achieved under 490 nm LED illumination.
- Highest FQE is obtained when plasmon resonance matches incident light wavelength.