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What is photocatalyst?

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  Photocatalysis is defined as “acceleration by the presence of as catalyst”. A catalyst does not change in itself or being consumedin the chemical reaction. This definition includes photosensitization, a process by which a photochemical alteration occurs in onemolecular entity as a result of initial absorption of radiation by another molecular entity called the photosensitized.Chlorophyll of plantsis a type of photocatalyst. Photocatalysis compared to photosynthesis, in which chlorophyll captures sunlight to turn water and carbondioxide into oxygen and glucose, photocatalysis creates strong oxidation agent to breakdown any organic  matter to carbon dioxideand water in the presence of photocatalyst, light and water.
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