Graphitized carbon nitride (g-C₃N₄), as a typical two-dimensional nano-material, has become a popular candidate material for functional membranes because of its customizable structure and good stability. Firstly, this paper introduces the basic properties, preparation methods and modification methods of original g-C₃N₄. Then, a series of construction methods of g-C₃N₄-based composite membranes are summarized. Finally, we focus on several typical applications such as ultrafiltration membranes, oil-water separation membranes, pollutant degradation membranes, osmosis membranes (traditional reverse osmosis membranes, reverse osmosis membranes, and forward osmosis membranes), pervaporation membranes, and gas phase separation membranes.

石墨化氮化碳（gC ₃ N ₄）作为一种典型的二维纳米材料，以其可定制的结构和良好的稳定性成为热门的功能膜候选材料。首先介绍了原gC ₃ N ₄的基本性质、制备方法和改性方法。_{那么，gC 3} N ₄的一系列构造方法对基复合膜进行了总结。最后，我们重点介绍了超滤膜、油水分离膜、污染物降解膜、渗透膜（传统的反渗透膜、反渗透膜和正渗透膜）、全蒸发膜和气相分离膜等几种典型应用。