Two-dimensional polymeric carbon nitride: structural engineering for optimizing photocatalysis

As a two-dimensional (2D) material, polymeric carbon nitride (g-C3N4) nanosheet holds great potentials in environmental purification and solar energy conversion. In this review, we summarized latest progress in the optimization of photocatalytic performance in 2D g-C3N4. Some of the latest structural engineering methods were summed up, where the relevant influences on the behaviors of photoinduced species were emphasized. Furthermore, the construction strategies for band structure modulation and charge separation promotion were then discussed in detail. A brief discussion on the opportunity and challenge of 2D g-C3N4-based photocatalysis are presented as the conclusion of this review.