Composite photocatalysts typically display enhanced photocatalytic performance. In this paper, the polycomplex Ag-AgI/AgCl/Bi₃O₄Cl_0.5Br_0.5 was prepared by a photo-reduction approach. The identity of the composite was confirmed by several characterization methods including, the structure of sample was confirmed by X-ray diffraction and high-resolution transmission electron microscopy, the morphology and element information of sample was investigated through scanning electron microscopy and SEM-mapping, the surface valence states of sample was confirmed by the X-ray photoelectron spectroscopy. Oilfield produced wastewater was chosen as the target in this study due to the toxicity and persistent nature of its components (pollutants such as, phenol and acrylamide). Ag-AgI/AgCl/Bi₃O₄Cl_0.5Br_0.5 exhibited superior photocatalytic activity than either Bi₃O₄Cl_0.5Br_0.5 or Ag-AgI/AgCl, after irradiation with visible and UV light for 5 h. Under visible irradiation 5 h, the Ag-AgI/AgCl/Bi₃O₄Cl_0.5Br_0.5 exhibited excellent photocatalytic activity for degradation phenol of 57.7%, which was about 4 times and 1.5 times higher than Bi₃O₄Cl_0.5Br_0.5 and Ag-AgI/AgCl, respectively. Additionally, the Ag-AgI/AgCl/Bi₃O₄Cl_0.5Br_0.5 displayed photodegradation rates of 41.0% for acrylamide after 5 h UV–visible light irradiation, which was approximately 3.1 times and 1.6 times when treated with Bi₃O₄Cl_0.5Br_0.5 and Ag-AgI/AgCl, respectively. The remarkable photocatalytic activity of AgI/AgCl/Bi₃O₄Cl_0.5Br_0.5 was further confirmed by the PL spectra, photocurrent response and electrochemical impedance. Furthermore, the stability and reusability were investigated by recycling experiments. In combination with the trapping experiments, the surface Plasmon resonance (SPR) of Ag-AgI/AgCl/Bi₃O₄Cl_0.5Br_0.5 reveals the catalyst has an ultra-fast charge-separation efficiency and possesses a high redox ability. In this this paper, a new approach for the synthesis of quaternary composites is described and these photocatalysts have been shown to efficiently degrade of oil field pollutants.

复合光催化剂通常显示出增强的光催化性能。本文中的复合物Ag-AgI / AgCl / Bi ₃ O ₄ Cl _0.5 Br _0.5由光还原法制备。通过多种表征方法确定了复合材料的身份，包括通过X射线衍射和高分辨率透射电子显微镜确定样品的结构，通过扫描电子显微镜和SEM映射研究样品的形态和元素信息， X射线光电子能谱确认了样品的表面价态。油田产生的废水由于其组分（污染物，如苯酚和丙烯酰胺）的毒性和持久性而被选为研究对象。Ag-AgI / AgCl / Bi ₃ O ₄ Cl _0.5 Br _0.5表现出比Bi _3都优异的光催化活性O ₄ Cl _0.5 Br _0.5或Ag-AgI / AgCl，用可见光和紫外线照射5小时后。在可见光照射5 h下，Ag-AgI / AgCl / Bi ₃ O ₄ Cl _0.5 Br _0.5表现出优良的降解苯酚的光催化活性，为57.7％，比Bi ₃ O ₄ Cl _0.5 Br _0.5分别高约4倍和1.5倍。和Ag-AgI / AgCl。另外，Ag-AgI / AgCl / Bi ₃ O ₄ Cl _0.5 Br _0.5紫外可见光照射5 h后，丙烯酰胺的光降解率为41.0％，分别用Bi ₃ O ₄ Cl _0.5 Br _0.5和Ag-AgI / AgCl处理时分别约为3.1倍和1.6倍。PL光谱，光电流响应和电化学阻抗进一步证实了AgI / AgCl / Bi ₃ O ₄ Cl _0.5 Br _0.5的显着光催化活性。此外，通过循环实验研究了稳定性和可重复使用性。结合捕获实验，Ag-AgI / AgCl / Bi ₃ O ₄ Cl _0.5的表面等离子体共振（SPR）Br _0.5表明该催化剂具有超快的电荷分离效率，并具有较高的氧化还原能力。在本文中，描述了一种合成季铵盐复合物的新方法，这些光催化剂已被证明可以有效降解油田污染物。