Photocatalytic Production of Hydrogen Peroxide from Seawater by Hydroxy-Functionalized K-Doped g-C3N4
Taking dicyandiamide as a raw material,ammonium chloride or ammonium oxalate as a gas tem-plate,and KCl as a molten salt,we synthesized two hydroxy-functionalized K-doped g-C3N4(ACCN and AOCN)by ioniothermal condensation reaction,which were used in photocatalytic production of hydrogen peroxide(H2O2)from seawater.Moreover,we investigated the production mechanism of H2O2 by adding trapping a-gents.The results show that,under the conditions of room temperature,atmospheric pressure,and neutral reac-tion,when air is taken as the molecular oxygen source,ethanol as the sacrificial agent,and simulated sunlight as the light source,the maximum H2O2 production rate can reach 1 622 μmol·g-1·h-1 at 6 h photocatalyzed by ACCN and AOCN.After centrifugation,ACCN and AOCN can be reused for 5 recycles,and their catalytic ac-tivities remain basically unchanged.
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