目的 解决g–C3N4存在的比表面积小，电子–空穴复合速率快从而导致光催化性能不佳等问题。方法 以尿素和硫脲为前驱体材料，通过热解聚辅助水蒸气活化合成S掺杂石墨相氮化碳(g–C3N4)，并用界面聚合制备出光催化型抗菌包装纸。利用扫描电镜(SEM)、红外光谱(FTIR)、水接触角(WCA)、热重分析(TGA)、光催化抗菌实验等对抗菌包装纸的形态结构、表面官能团、纸张性质、光催化抗菌性进行详细研究。结果 致密的g–C3N4层有效提高了抗菌包装纸的疏水性和热稳定性。可见光照射下，光催化型抗菌包装纸对大肠杆菌和金黄色葡萄球菌的杀灭率达100%。未经可见光照射的原纸比光催化型包装纸的抗菌性差。结论 g–C3N4光催化型抗菌包装纸具有良好的广谱抗菌性，为绿色抗菌包装材料的制备提供了新思路。

The work aims to solve the problems such as the small specific surface area of g-C3N4 and the fast electron-hole recombination rate leading to poor photocatalytic performance, S-doped graphite phase carbon nitdrive (g-C3N4) was synthesized by pyrolysis polymerization assisted by water vapor activation with urea and thiourea as precursor materials, and photocatalytic antibacterial packaging paper was prepared by interfacial polymerization. The morphology, surface functional groups, physical and photocatalytic antibacterial properties of packaging paper were investigated in detail by SEM, FTIR, WCA, TGA and photocatalytic antibacterial test. The dense g-C3N4 layer effectively improved the hydrophobicity and thermal stability of antibacterial packaging paper. Under visible light irradiation, photocatalytic antibacterial packaging paper could inactivate about 100% of Escherichia coli (E.coli) and Staphylococcus aureus (S.aureus) cells. The base paper without visible light irradiation had poor antibacterial properties compared with the photocatalytic packaging paper. g-C3N4 photocatalytic antibacterial packaging paper has good broad-spectrum antibacterial properties, which provides a new method for the preparation of green antibacterial packaging materials.