Novel highly visible-light active 1.0rGO–ZnBi₂O₄–Bi₂S₃ heterostructure photocatalysts with various weight percentages of Bi₂S₃ were successfully synthesized. First, the 1.0rGO–ZnBi₂O₄ catalyst was synthesized by a simple two-step oxidation–reduction and co-precipitation methods, followed by heating at 450 °C. Then, 1.0rGO–ZnBi₂O₄ was hydrothermally treated with Bi³⁺, and thiourea in ethylene glycol to obtain the 1.0rGO–ZnBi₂O₄–Bi₂S₃ heterostructure photocatalyst. The obtained 1.0rGO–ZnBi₂O₄–Bi₂S₃ heterostructure photocatalysts were characterized by X-ray diffraction, UV–Vis diffuse reflectance spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy. Photocatalytic studies were conducted using Indigo carmine and it was found that the heterostructure photocatalyst enabled an almost complete degradation of the pollutants. The enhanced catalytic activity of the 1.0rGO–ZnBi₂O₄–2.0Bi₂S₃ heterostructure photocatalyst is due to the homogeneous distribution of ZnBi₂O₄–2.0Bi₂S₃ over rGO as well as to the efficient electron-transfer from Bi₂S₃ to ZnBi₂O₄ and finally to rGO. More than 97% of Indigo carmine of 50 mg/L was degraded by 1.0rGO–ZnBi₂O₄–2.0Bi₂S₃ in 75 min of visible light irradiation. The reusability of the 1.0rGO–ZnBi₂O₄–2.0Bi₂S₃ was studied, and after four cycles, the Indigo carmine degradation efficiency decreased to 90%.The mechanism of the Indigo carmine degradation by the 1.0rGO–ZnBi₂O₄–2.0Bi₂S₃ catalysis likely consists of to two main processes: first, charge transfer prolongs the lifetime of the electron–hole pairs, and then the electron–hole pairs participate in the reactions that produce free radicals.

成功合成了具有不同重量百分比的Bi ₂ S _3的新型高可见光活性1.0rGO-ZnBi ₂ O ₄ -Bi ₂ S ₃异质结构光催化剂。首先，通过简单的两步氧化还原和共沉淀方法，然后在450°C下加热，合成了1.0rGO-ZnBi ₂ O ₄催化剂。然后，用Bi ³⁺和硫脲在乙二醇中对1.0rGO-ZnBi ₂ O ₄进行水热处理，得到1.0rGO-ZnBi ₂ O ₄ -Bi ₂ S ₃异质结构光催化剂。通过X射线衍射，UV-Vis漫反射光谱，扫描电子显微镜，X射线光电子能谱和拉曼光谱对得到的1.0rGO-ZnBi ₂ O ₄ -Bi ₂ S ₃异质结构光催化剂进行了表征。使用靛蓝胭脂红进行光催化研究，发现异质结构光催化剂几乎可以完全降解污染物。1.0rGO–ZnBi ₂ O ₄ –2.0Bi ₂ S ₃异质结构光催化剂的催化活性增强是由于ZnBi ₂ O ₄的均匀分布–2.0Bi ₂ S ₃在rGO上，以及从Bi ₂ S ₃到ZnBi ₂ O ₄以及最后到rGO的有效电子转移。在75分钟的可见光照射下，1.0rGO-ZnBi ₂ O ₄ –2.0Bi ₂ S ₃降解了50 mg / L的靛蓝胭脂红中的97％以上。研究了1.0rGO–ZnBi ₂ O ₄ –2.0Bi ₂ S ₃的可重用性，经过四个循环后，靛蓝胭脂红的降解效率降至90％。1.0rGO–ZnBi ₂ O引起靛蓝胭脂红的降解机理₄–2.0Bi ₂ S ₃催化可能包括两个主要过程：首先，电荷转移延长了电子-空穴对的寿命，然后电子-空穴对参与了产生自由基的反应。