TiO2 photocatalysts for degradation of micropollutants in water

Micropollutants are water pollutants with the maximum concentrations as high as few micro- grams/liter and the minimum concentrations as low as few nanograms/liter of water. Micro- pollutants typically enter water streams as a result of human activity. Advanced oxidation processes are water puri- fication technologies which involve generation of strong oxidizing species that destroy pollutants. Photocatalysis is light-activated acceleration of chemical reactions in the presence of a light- absorbing photocatalyst material. Heterogeneous photocatalysis uses a light- absorbing solid photocatalyst to produce oxidiz- ing and reducing species in the presence of light. Heterogeneous photocatalysis is one of the advanced oxidation technologies for water treat- ment, which uses strong oxidizing species to degrade organic pollutants.