The graphitic carbon nitride (g-C₃N₄) which is a two-dimensional conjugated polymer, has drawn broad interdisciplinary attention as a low-cost, metal-free, and visible-light-responsive photocatalyst in the area of environmental remediation. The g-C₃N₄-based materials have excellent electronic band structures, electron-rich properties, basic surface functionalities, high physicochemical stabilities, and are “earth-abundant”. This review summarizes the latest progress related to the design and construction of g-C₃N₄-based materials and their applications including catalysis, sensing, imaging, and white-light-emitting-diodes. An outlook on possible further developments in g-C₃N₄ based research for emerging properties and applications is also included.

作为二维共轭聚合物的石墨碳氮化物（gC ₃ N ₄）作为低成本，无金属，可见光响应的光催化剂在环境修复领域引起了广泛的学科关注。基于gC ₃ N ₄的材料具有出色的电子能带结构，富电子特性，基本表面功能性，高物理化学稳定性，并且是“地球丰富的”。这篇综述总结了与基于gC ₃ N ₄的材料的设计和构造及其应用（包括催化，感测，成像和发白光二极管）有关的最新进展。对gC可能进一步发展的展望还包括基于₃ N ₄的新兴特性和应用的研究。