Photocatalysis
Photocatalytically active coatings are used to give self-cleaning properties to surfaces, clean air and water, or kill bacteria, algae and fungi. Organic contaminants are degraded to H2O and CO2 by irradiation with light of a suitable wavelength, usually UV light. In principle, the photocatalysis dispenses with additional chemical substances and is therefore one of the most environmentally friendly and sustainable technologies.