The g-C₃N₄ nanosheet was prepared by calcination method, the MoS₂ nanosheet was prepared by hydrothermal method. The g-C₃N₄/MoS₂ composites were prepared by ultrasonic composite in anhydrous ethanol. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, ultraviolet–visible spectroscopy, and photoluminescence techniques were used to characterize the materials. The photocatalytic degradation of Rhodamine B (Rh B) by g-C₃N₄/MoS₂ composites with different mass ratios was investigated under visible light. The results show that a small amount of MoS₂ combined with g-C₃N₄ can significantly improve photocatalytic activity. The g-C₃N₄/MoS₂ composite with a mass ratio of 1:8 has the highest photocatalytic activity, and the degradation rate of Rh B increases from 50 to 99.6%. The main reason is that MoS₂ and g-C₃N₄ have a matching band structure. The separation rate of photogenerated electron–hole pairs is enhanced. So the g-C₃N₄/MoS₂ composite can improve the photocatalytic activity. Through the active material capture experiment, it is found that the main active material in the photocatalytic reaction process is holes, followed by superoxide radicals.

gC ₃ N ₄纳米片采用煅烧法制备，MoS ₂纳米片采用水热法制备。gC ₃ N ₄ /MoS ₂复合材料在无水乙醇中通过超声复合制备。X射线衍射、扫描电子显微镜、透射电子显微镜、X射线光电子能谱、紫外-可见光谱和光致发光技术被用来表征材料。在可见光下研究了不同质量比的gC ₃ N ₄ /MoS ₂复合材料对罗丹明B（Rh B）的光催化降解。结果表明，少量的 MoS₂与gC ₃ N ₄结合可显着提高光催化活性。质量比为1:8的gC ₃ N ₄ /MoS ₂复合物具有最高的光催化活性，Rh B的降解率从50%提高到99.6%。主要原因是MoS ₂和gC ₃ N ₄具有匹配的能带结构。光生电子-空穴对的分离率提高。所以 gC ₃ N ₄ /MoS ₂复合材料可以提高光催化活性。通过活性物质捕获实验发现，光催化反应过程中的主要活性物质是空穴，其次是超氧自由基。