BiOCl/BiOI复合光催化剂的制备及其降解四环素的性能研究

Preparation of BiOCl/BiOI composite photocatalyst and its performance in the degradation of tetracycline

使用溶剂热法制备BiOCl/BiOI复合光催化剂,利用XRD、SEM、UV-Vis、XPS等技术手段对两相复合材料的晶体、形貌和性质等进行表征。使用氙灯模拟太阳光源照射样品,分析光催化材料对四环素的降解能力。结果表明,复合比例为Cl∶I=3∶7时,光催化降解效果最优,反应80 min,四环素的降解率可达87%,这是由于两相复合材料中形成了异质结,使得材料的光催化活性得到显著提升,且光生载流子的分离效率得到提高。

BiOCl/BiOI Composites photocatalysts were synthesized via solvothermal approach.XRD,SEM,UV-Vis,XPS and other techniques were used to characterize the crystal,morphology and properties of the two-phase composite material.Xenon lamp was used to simulate the irradiation of solar light source to analyze the degradation ability of photocatalytic materials on tetracycline.The results showed that when the composite ratio of Cl∶I=3∶7,over 87%tetracycline was degraded and shown the best photocatalytic effect in 80 min.This is because of the formation of heterojunction in the two-phase composite material,which significantly improves the photocatalytic activity of the material and enhanced photogenerated carriers’separation efficiencies.