Boosting photocatalytic degradation of antibiotic wastewater by synergy effect of heterojunction and phosphorus doping
Boosting photocatalytic degradation of antibiotic wastewater by synergy effect of heterojunction and phosphorus doping
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异质结与磷掺杂协同作用促进抗生素废水光催化降解
DOI：
10.1016/j.jcis.2020.08.099
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发表时间：
2021
影响因子：
9.9
通讯作者：
Guan Guofeng
中科院分区：
文献类型：
--
作者：
Zhou Jie;Ding Jing;Wan Hui;Guan Guofeng
采用溶剂热法制备了磷掺杂g-C3 N4/ZnIn 2S 4（PCN/ZIS）异质结光催化剂。采用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）等测试手段对复合材料的物理化学性能进行了研究。10%PCN/ZIS对四环素的光催化降解性能最好，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，通过自由基捕获实验，得出空穴和超氧阴离子自由基（O2-）在光催化反应中起主导作用，而羟基自由基（OH-）起负面作用的结论。此外，10%PCN/ZIS具有良好的稳定性和可重复使用性，对土霉素、金霉素和氧氟沙星也表现出较高的光催化活性。总体而言，PCN/ZIS光催化剂的光催化性能有所提高，有望应用于抗生素废水的光催化降解。
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.