An oxygen-doped carbon nitride / Co3O4 heterojunction photocatalyst, a preparation method and application thereof

Abstract

The application belongs to the technical field of photocatalytic materials, and particularly relates to an oxygen-doped carbon nitride / Co3O4 heterojunction photocatalyst as well as a preparation method and application thereof. The application provides a preparation method of the oxygen-doped carbon nitride / Co3O4 heterojunction photocatalyst, which comprises the following steps: mixing urea and oxalic acid to perform first calcination to obtain oxygen-doped carbon nitride; mixing cobalt nitrate, 2-methyl imidazole and an alcohol solvent to perform first reaction to obtain MOF-Co; and mixing the oxygen-doped carbon nitride and the MOF-Co to perform second calcination to obtain the oxygen-doped carbon nitride / Co3O4 heterojunction photocatalyst. The graphite phase carbon nitride is doped with oxygen and then is compounded with the MOF-Co, so that the prepared photocatalyst has a larger specific surface area, more reaction active sites, a wider visible light response intensity, and an enhanced separation and transfer rate of photo-generated carriers, and has excellent photocatalytic performance and a high pollutant degradation efficiency.

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