Phosphorus-doped g-C₃N₄/ZnIn₂S₄ (PCN/ZIS) heterojunction photocatalysts were constructed by solvothermal method. The physical and chemical properties were investigated with X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance spectroscopy (DRS), etc. The degradation of antibiotic wastewater was used to investigate the photocatalytic activities of composites under visible-light irradiation. The 10% PCN/ZIS had the best photocatalytic degradation performance for tetracycline with a photodegradation rate of 0.0874 min⁻¹, which is respectively about 2.9 and 52.0 times than that of pure ZIS and PCN. Meanwhile, it was concluded that the holes and ⋅O₂^– (superoxide radicals) play dominant roles in the photocatalytic reactions through radicals trapping experiments, while ⋅OH (hydroxyl radicals) has a negative effect. In addition, 10%PCN/ZIS, with excellent stability and recyclability, also exhibited high photocatalytic activity for terramycin, chlortetracycline and ofloxacin. Overall, with the enhanced photocatalytic performance, PCN/ZIS could be potentially applied for photocatalytic degradation of antibiotic wastewater.

采用溶剂热法制备了磷掺杂的gC ₃ N ₄ / ZnIn ₂ S ₄（PCN / ZIS）异质结光催化剂。通过X射线衍射（XRD），透射电子显微镜（TEM），X射线光电子能谱（XPS），紫外可见漫反射光谱（DRS）等研究了物理和化学性质。用于研究复合材料在可见光照射下的光催化活性。10％PCN / ZIS对四环素具有最佳的光催化降解性能，光降解速率为0.0874 min ^-1，分别是纯ZIS和PCN的2.9倍和52.0倍。同时，得出的结论是孔和⋅O ₂ ^- （超氧自由基）通过自由基捕捉实验起到光催化反应占主导地位的角色，而⋅OH（羟基自由基）具有负面影响。此外，具有优良稳定性和可回收性的10％PCN / ZIS对土霉素，金霉素和氧氟沙星也显示出高光催化活性。总体而言，随着光催化性能的增强，PCN / ZIS可以潜在地应用于抗生素废水的光催化降解。