Copper Atoms Regulate Cyanamide Carbon Nitride to Improve Photocatalytic CO2 Reduction Performance
Copper atom regulate cyanamide functional carbon nitride can effectively solve the defects of limited light absorption range and high carrier-hole recombination rate of g-C3N4. Cyanamide functionalized carbon nitride (NCN-CNx) was successfully synthesized by thermal polymerization of KSCN molten salt and g-C3N4, and then a series of NCN-Cu catalysts were synthesized by codeposition method. The properties of the catalysts were evaluated by gas chromatography. The physicochemical properties, thermodynamic and kinetic properties of the catalysts were analyzed by XRD, SEM, XPS, FT-IR, UV-Vis, PL, EIS and I-t. The results showed that photocatalytic CO2 reduction performance can be significantly improved by linking copper atoms to carbon-nitrogen polymers through cyano groups. Photocatalytic experiments showed that the yield of CO of 1％ NCN-Cu was 43.2 μmol·g-1, and the yield of CH4 was 22.3 μmol·g-1, showing the best photocatalytic performance.
Molten saltCO2Single atomBuilt-in electric fieldCatalyst
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