A quasi-hexagonal prism-shaped carbon nitride for photoreduction of carbon dioxide under visible light

Abstract

A quasi-hexagonal prism-shaped carbon nitride (H-C₃N₄) was synthesized from urea-derived C₃N₄ (U-C₃N₄) using an alkaline hydrothermal process. U-C₃N₄ decomposition followed by hydrogen bond rearrangement of hydrolyzed products leads to the formation of a quasi-hexagonal prism-shaped structure. The H-C₃N₄ catalysts displayed superior activity in the photoreduction of CO₂ with H₂O compared to U-C₃N₄. The enhanced photocatalytic activities can be attributed to the promotion of incompletely coordinated nitrogen atom formation in the C₃N₄ molecules.

Graphical abstract

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