通过原位沉积法将BiOCl负载到膨胀珍珠岩（EP）孔隙表面，制备出新型漂浮型BiOCl/EP光催化剂，并通过一系列手段对样品进行表征。结果表明，在模拟太阳光照射下，BiOCl/EP复合材料在125 min内对100 mL 15 mg/L罗丹明B溶液的降解率可达95.8%，远高于纯BiOCl。光催化活性的提高主要归因于BiOCl/EP复合材料中的Bi—O—Si键可作为电子传输通道促进光生电子-空穴对的分离和迁移、更高效的太阳光能利用率以及活性氧物种产生的效率。经过5次连续循环使用后，该复合物的光催化降解效率仍可达到91.0%。

A novel floating BiOCl/EP photocatalyst is prepared by loading BiOCl onto the pores surface of expanded perlite (EP) through in situ deposition method.The prepared BiOCl/EP photocatalyst is characterized by a series of instruments.The results show that the degradation rate of Rhodamine B reaches 95.8% when 100 mL of Rhodamine B solution with a concentration of 15 mg·L^-1 has been degraded by BiOCl/EP photocatalyst under simulated solar-light irradiation for 125 min, which is much higher than that by pure BiOCl.The enhancement in photocatalytic activity of BiOCl/EP composite can be mainly attributed to high-efficiency photogenerated electron-hole pair separation and migration via the formed Bi—O—Si bonds in BiOCl/EP, high-efficiency solar-light utilization and more reactive oxygen species (ROSs) production.The photocatalytic efficiency of BiOCl/EP still reaches 91.0% even after it has been used for 5 consecutive cycles.

尹金慧(1996-),女,硕士研究生,研究方向为铋基光催化材料,yinjinhui0811@qq.com