合成了一系列不同质量比的Bi₅O₇I/Ag₃PO₄复合光催化剂，并通过XRD、FT-IR、SEM和UV-Vis DRS分别对其晶体结构、官能团、微观形貌和吸收光谱进行表征。利用模拟太阳光照射下罗丹明B （RhB）的降解速率评估所制备样品的光催化性能。结果表明，复合材料的光催化活性均高于纯Bi₅O₇I或Ag₃PO₄；其中Bi₅O₇I/Ag₃PO₄-25%的光降解能力更为显著，最佳条件下RhB仅需50 min即可完全降解，TOC去除率高达59.89%。捕获实验证实光催化过程中的主要活性物质是羟基自由基（·OH）和光生空穴（h⁺）。

A series of Bi₅O₇I/Ag₃PO₄ composite photocatalysts with different mass ratios are synthesized,and their crystal structures,functional groups,morphology and absorption spectra are characterized by XRD,FT-IR,SEM and UV-Vis DRS,respectively.The degradation rate of rhodamine B (RhB) under simulated solar irradiation is used to evaluate the photocatalytic performance of the prepared samples.It is shown that the photocatalytic activity of all prepared composites is higher than that of pure Bi₅O₇I or Ag₃PO₄.Among the composites,the photo-degradation ability of Bi₅O₇I/Ag₃PO₄-25% is the most remarkable,over which RhB can be degraded completely in 50 min under optimal conditions,and the removal rate of TOC reaches 59.89%.Trapping experiments confirm that hydroxyl radicals (·OH) and photogenerated holes (h⁺) are the main active substances in the photocatalytic process.

刘书松(1993-),男,硕士研究生,研究方向为环境污染分析与控制,liushusong＿zr@163.com