Searching for a stable and efficient photocatalyst still presents a variety of challenges, when photocatalytic technology is widely used today. In this paper, oxygen-vacancy BiOCl with different masses was loaded on Bi₄O₅Br₂ nanosheets by a simple two-step method. The UV–Dis spectrum showed that the absorption range of the complex to visible light was larger than that of the two pure substances. In addition, the PL, $i$–$t$ and EIS characterization prove that the formation of heterogeneous interface between the two materials accelerated the charge transfer in the semiconductor, eventually making photocatalytic efficiency significantly increased. The results showed that the 1 wt.% Ov-BOC@BOB has the best degradation performance, which was seven and four times than that of Ov-BOC and BOB within 120 min, respectively. Free radical capture experiment further confirmed that the charge transfer between oxygen-vacancy BiOCl and Bi₄O₅Br₂ conforms to the Z-type transfer mechanism, such a charge-transfer mechanism would leave behind strongly reducing electrons and strongly oxidizing holes, respectively. The degradation rate of ciprofloxacin (CIP) was not significantly reduced after five cycles of experiments, indicating that the compound had good stability. This study provides a feasible idea for exploring stable and efficient photocatalysts.

在光催化技术广泛应用的今天，寻找稳定高效的光催化剂仍然面临着各种挑战。本文通过简单的两步法将不同质量的氧空位BiOCl负载到Bi ₄ O ₅ Br _{2纳米片上。}UV-Dis光谱显示配合物对可见光的吸收范围大于两种纯物质的吸收范围。此外，PL、$我$–$t$EIS表征证明两种材料之间异质界面的形成加速了半导体中的电荷转移，最终使光催化效率显着提高。结果表明，1 wt.% Ov-BOC@BOB 的降解性能最好，在 120 min 内分别是 Ov-BOC 和 BOB 的 7 倍和 4 倍。自由基捕获实验进一步证实了氧空位BiOCl与Bi ₄ O ₅ Br _{2之间的电荷转移}符合Z型转移机制，这种电荷转移机制将分别留下强还原性电子和强氧化性空穴。经过5个循环实验后，环丙沙星（CIP）的降解率没有明显降低，表明该化合物具有良好的稳定性。该研究为探索稳定高效的光催化剂提供了可行的思路。