A series of different ratios of Bi₄O₅I₂/Ag₃PO₄ (abbreviated as Bi₄AP) composite photocatalysts were synthesized and characterized through XRD, FT-IR, SEM, EDS and UV-vis DRS analysis, respectively. The photocatalytic properties of as-prepared samples were evaluated by photodegradation of Rhodamine B (RhB) in the visible range. The results showed that the photocatalytic activity of the composite photocatalyst was higher than that of pure Bi₄O₅I₂ or Ag₃PO₄. Among the as-prepared samples, the photodegradation ability of Bi₄AP-3 was more remarkable, and RhB underwent complete degradation in 60 min under optimal conditions (T = 308K, pH = 9). Trapping experiments proved that photogenerated holes (h⁺) were the main active substance in the photocatalytic process, superoxide radicals (·O₂^-) and hydroxyl radicals (·OH) also played an important role. Furthermore, the photocatalytic mechanism was also proposed.

合成了一系列不同比例的Bi ₄ O ₅ I ₂ / Ag ₃ PO ₄（简称Bi ₄ AP）复合光催化剂，并分别通过XRD，FT-IR，SEM，EDS和UV-vis DRS分析对其进行了表征。通过在可见光范围内若丹明B（RhB）的光降解来评估所制备样品的光催化性能。结果表明，复合光催化剂的光催化活性高于纯Bi ₄ O ₅ I ₂或Ag ₃ PO ₄。在制备的样品中，Bi ₄的光降解能力AP-3更显着，在最佳条件下（T = 308K，pH = 9），RhB在60分钟内完全降解。捕集证明了光生空穴（h实验⁺）均在光催化过程中的主要活性物质，超氧自由基（·O2 ₂ ^- ）和羟基自由基（·OH）也发挥了重要作用。此外，还提出了光催化机理。