Making multiple heterojunction of photocatalysts is an effect approach to achieve high effective utilization of solar resource. A novel ternary AgI/BiOI/pg-C₃N₄ nanocomposite was synthesized with a unique n-p-n heterojunction. In this work, an in-situ transformation method was used to fabricate AgI/BiOI/pg-C₃N₄ heterostructure with different AgI/BiOI ratios. The photocatalytic activity of the AgI/BiOI/pg-C₃N₄ was detected by the degradation of methylene orange (MO) and tetracycline (TC). The AgI/BiOI/pg-C₃N₄ composites exhibited better photocatalytic activity than pg-C₃N₄ and BiOI/pg-C₃N₄ composite. The performance of photocatalytic antibacterial inactivation of E. coli indicated that the AgI/BiOI/pg-C₃N₄ heterostructure is an ideal material for antibacterial applications. The ESR and trapping experiments confirmed that the degradation of organic pollution is completed through the co-work of •O₂⁻, •OH and h⁺. A possible mechanism of the degradation process is proposed.

使光催化剂形成多个异质结是一种有效利用太阳能的有效途径。合成了具有独特的npn异质结的新型三元AgI / BiOI / pg-C ₃ N ₄纳米复合材料。在这项工作中，原位转化方法用于制造具有不同AgI / BiOI比的AgI / BiOI / pg-C ₃ N ₄异质结构。AgI / BiOI / pg-C ₃ N ₄的光催化活性通过亚甲基橙（MO）和四环素（TC）的降解来检测。AgI / BiOI / pg-C ₃ N ₄复合材料表现出比pg-C ₃ N ₄更好的光催化活性和BiOI / pg-C ₃ N ₄复合材料。大肠杆菌的光催化抗菌灭活性能表明，AgI / BiOI / pg-C ₃ N ₄异质结构是抗菌应用的理想材料。的ESR和诱捕实验证实，有机污染的降解是通过•的O共同工作完成₂ ^-，•OH和H ⁺。提出了降解过程的可能机理。