Photocatalytic Production Mechanism
Illustration of photocatalytic production of reactive oxygen species. A photon excites the photocatalyst TiO2, which creates electron (e-)-hole (e+) pairs; these, in turn, generate reactive oxygen species, including hydroxyl radicals (OH•). The hydroxyl radicals then react with and destroy the contaminants in the water.

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Photo by: Jonathon Brame |  VIRIN: 170517-A-VW406-002.JPG