Review on photocatalyst coatings for air purification

Photocatalytic oxidation is one of the air purification methods for organic pollutant deterioration such as formaldehyde, Volatile organic compounds, bacteria and other chemicals under UV lights. One of the major applications of photocatalyst is in building coatings. Radicals are formed when a photocatalyst is subjected to radiation. The end products of these chain reactions are water and carbon dioxide, if the reactions are fully completed mineralization. If mineralization does not take place, then a great number of side products can be formed, whose properties are not well understood. In this paper performance of photocatalysts, usual and typical photocatalyst, the ways for improvement of photocatalysts performance, deactivation, performance evaluation of PCO air purification, intermediates production and problems were investigated.