Photocatalysts are materials that absorb light and use the energy to catalyze chemical reactions. In the context of antimicrobial activity, photocatalysts like titanium dioxide (TiO2) can generate ROS upon exposure to UV or visible light, which can effectively kill a wide range of microorganisms. Photocatalytic antimicrobial agents are particularly useful in applications where continuous light exposure is feasible, such as in water purification systems and surface coatings.
