以硝酸铋、PEG 4000、NaCl、KI和NaOH为原料，通过简单的液相沉淀法制备出组装态Bi₅O₇I纳米材料。通过XRD、XPS、SEM、UV-Vis等对所得产物进行测试和表征，研究了不同NaCl和KI的添加量对Bi₅O₇I的形成和光催化活性的影响，并对光催化反应机理进行了探索。结果表明，NaCl和KI的加入量分别为45 mL和5 mL时，所得Bi₅O₇I样品光催化性能最好；见光2 h后，对罗丹明B （RhB）、亚甲基蓝（MB）和环丙沙星（CIP）的光催化降解率分别为92.53%、88.15%、42.33%。

Assembled Bi₅O₇I nanomaterials are prepared by a simple liquid-phase precipitation method at 75℃ through using bismuth nitrate,polyethylene glycol 4000 (PEG 4000),sodium chloride,potassium iodide and sodium hydroxide as raw materials.The products are characterized by X-ray diffraction (XRD),X-ray photoelectron spectroscopy (XPS),scanning electron microscope (SEM) and ultraviolet-visible spectrophotometer (UV-Vis).Effects of different adding amounts of NaCl and KI on the formation of Bi₅O₇I and its photocatalytic activity are studied,and the photocatalytic mechanism is explored.It is shown that the best photocatalytic performance can be obtained by the Bi₅O₇I sample prepared under the conditions that the dosages of NaCl and KI are 45 mL and 5 mL,respectively,over which the degradation rates of RhB,methylene blue and ciprofloxacin can reach 92.53%,88.15%,42.33%,respectively after 2 h of light irradiation.

宋月红(1986-),女,博士研究生,讲师,研究方向为光催化技术,s＿yh1009@163.com