What are the Ideal Band Gap Energies for Photocatalysts?
The ideal band gap energy for a photocatalyst depends on the desired application: - For hydrogen production via water splitting, a band gap of around 1.8 to 2.2 eV is often considered ideal as it allows for the absorption of visible light. - For environmental applications, such as degradation of organic pollutants, a broader range of band gaps (2.2 to 3.2 eV) can be effective, depending on the specific contaminant and light source.
