中文摘要：

本文采用不同pH值下一步法合成Bi2O2(BO2OH)/BiOIO3复合材料，通过XRD、SEM、TEM、UV-vis等测试手段分析复合材料的结晶情况和形貌特征。通过紫外条件下降解模拟污染物罗丹明染料来测试复合材料的光催化活性。结果表明：Bi2O2(BO2OH)/BiOIO3复合材料能够成功合成，在制备条件为pH=7的情况下具有最高的光催化降解速率。复合材料优异的光催化性能是由于复合材料的不同组分有相互重叠的能带结构，从而抑制了载流子的复合。

英文摘要：

This paper discusses the influence of alkaline condition for Bi2O2 (BiO2OH)/BiOIO3 heterostructure. The composites were prepared by one-step method under different pH environment. The crystallization and morphology ofthe composites were analyzed by XRD, SEM and UV-vis. Photocayalytic activity was measured by decomposition of Rhodamine B (RhB) under UV-light irradiation. The results show that Bi2O2 (BiO2OH)/BiOIO3 composites can be successfully synthesized and have the highest photocatalytic degradation rate under the condition of pH = 7. This significant enhancement of degradation dye and prohibitive electron-hole pairs’ recombination should be ascribed to overlapping conduction band and valence band structure.