In this work, Z-scheme Ag₂S/Bi₂O₃ composites were fabricated through the precipitation of Ag₂S nanoplates on the surface of Bi₂O₃ microrods. Consequently, Au nanoparticles were selectively deposited on the Ag₂S nanoplates surface to obtain.

Au-Ag₂S/Bi₂O₃ composites using near-infrared light photodeposition method. The characterization results indicate that the Ag₂S nanoplates were uniformly anchored on Bi₂O₃ surface, and Au nanoparticles were highly dispersed on the surface of Ag₂S nanoplate instead of Bi₂O₃. Acid orange 7 (AO7), Rhodamine B (RhB) and Cr(VI) were chosen as model reactant for the evaluation of photocatalytic degradation and reduction activity of the products under simulated sunlight irradiation. After the decoration of Ag₂S nanoplates, the photocatalytic activity of Ag₂S/Bi₂O₃ is much higher than that of bare Bi₂O₃, and the optimal catalytic efficiency is achieved by 12 %Ag₂S/Bi₂O₃ sample. More importantly, the photocatalytic activity of 12 %Ag₂S/Bi₂O₃ sample can be further enhanced by the selective decoration Au nanoparticles on the Ag₂S nanoplates. Among the ternary composites, 2Au-12 %Ag₂S/Bi₂O₃ sample with the Au content of 2% exhibits highest catalytic efficiency for 60 min (AO7: 96%; RhB: 56%; Cr(VI): 65%). The possible mechanism for the improvement of the photocatalytic activity of Bi₂O₃ by Ag₂S and Au decoration was proposed.

在这项工作中，Z 型Ag ₂ S/Bi ₂ O ₃复合材料是通过在Bi ₂ O _{3 微}棒表面上沉淀Ag ₂ S 纳米片来制备的。因此，Au 纳米粒子被选择性地沉积在 Ag ₂ S 纳米片表面上以获得。

Au-Ag ₂ S/Bi ₂ O ₃复合材料采用近红外光光沉积法。表征结果表明，Ag ₂ S 纳米片均匀地固定在Bi ₂ O ₃表面，Au 纳米颗粒高度分散在Ag ₂ S 纳米片而不是Bi ₂ O _{3 表面}。选择酸性橙 7 (AO7)、若丹明 B (RhB) 和 Cr(VI) 作为模型反应物，用于评估模拟阳光照射下产物的光催化降解和还原活性。Ag ₂ S纳米片修饰后Ag ₂ S/Bi的光催化活性₂ O ₃远高于裸Bi ₂ O ₃，最佳催化效率由12%Ag ₂ S/Bi ₂ O ₃样品实现。更重要的是，12%Ag ₂ S/Bi ₂ O ₃样品的光催化活性可以通过Ag ₂ S纳米板上的选择性装饰Au纳米颗粒进一步增强。三元复合材料中，2Au-12%Ag ₂ S/Bi ₂ O ₃Au含量为 2% 的样品在 60 分钟内表现出最高的催化效率（AO7：96%；RhB：56%；Cr(VI)：65%）。提出了通过Ag ₂ S和Au装饰提高Bi ₂ O ₃光催化活性的可能机制。