When photocatalytic coatings are exposed to light, the energy from the light excites electrons in the photocatalyst material. This excitation results in the formation of electron-hole pairs. The electrons and holes then participate in redox reactions that produce highly reactive species. These reactive species can break down organic pollutants, kill microorganisms, and convert harmful gases into less harmful substances. The process is cyclical and the photocatalyst remains active as long as it is exposed to light, making it a sustainable solution.
