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Impregnation of the nanocrystalline TiO2 Degussa/Evonik P25 by colloidal graphene oxide produced by the Hummers method (H-GO) results in a 4-fold acceleration of photocatalytic gas-phase oxidation of ethanol and benzene vapors by air oxygen as a result of enhanced separation of the photogenerated charge carriers between TiO2 and H-GO. Preliminary photochemical reduction of H-GO decreases drastically...
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