Jisho

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ひかりしょくばい 光触媒
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Noun
1. photocatalyst; photocatalysis​Abbreviation, See also 光触媒作用
Wikipedia definition
2. Photocatalysis​In chemistry, photocatalysis is the acceleration of a photoreaction in the presence of a catalyst. In catalysed photolysis, light is absorbed by an adsorbed substrate. In photogenerated catalysis, the photocatalytic activity (PCA) depends on the ability of the catalyst to create electron–hole pairs, which generate free radicals able to undergo secondary reactions. Its comprehension has been made possible ever since the discovery of water electrolysis by means of the titanium dioxide.
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