Bismuth oxyhalide BiOX (X=Cl, Br, I) as a new photocatalyst, its series of BiOX, and composite photocatalyst materials have attracted much attention. In this paper, we used Bi(NO₃)₃⋅5H₂O, NaOH, and WS₂ as raw materials to prepare WS₂/BiOCl heterojunction composite materials by in situ construction method, and using X-ray diffraction, EDS element mapping, and other analytical means found the crystallization of WS₂/BiOCl composite materials. With the increase of the mass ratio of WS₂, the XRD peak of WS₂ in the composite became sharp gradually. The visible light response range of BiOCl increased, and the band gap became narrow. The recombination probability of photogenerated electron-hole pair decreased. BiOCl (1–2 μm) was stacked on the WS₂ (2–5 μm) layer, and formed the WS₂/BiOCl heterostructure. The results showed that 7%-WS₂/BiOCl had the best adsorption effect, and the degradation efficiency reached 95.83% at 240 min. At the same time, the active groups in the photocatalytic degradation process are ⋅OH and h⁺. Through the first-order kinetic simulation, the reaction rate constant of 7%-WS₂/BiOCl was 0.0155 min^− 1, which was 4.2 times that of BiOCl. After four cycles of experiments, it still had stable photocatalytic activity.

卤氧化铋BiOX（X = Cl，Br，I）作为新型光催化剂，其系列的BiOX和复合光催化剂材料备受关注。在本文中，我们使用的Bi（NO ₃）₃ ⋅5H ₂ O，NaOH和WS ₂为原料制备WS ₂ /的BiOCl异质结复合材料原位施工方法，并采用X射线衍射，EDS元素映射，以及其他分析手段发现了WS ₂ / BiOCl复合材料的结晶。与WS的质量比的增大₂，WS的XRD峰₂在复合材料中逐渐变得尖锐。BiOCl的可见光响应范围增加，并且带隙变窄。光生电子-空穴对的重组概率降低。BiOCl（1-2μm）堆叠在WS ₂（2-5μm）层上，并形成WS ₂ / BiOCl异质结构。结果表明，7 ％ -WS ₂ / BiOCl吸附效果最好，240 min降解效率达到95.83 ％。同时，光催化降解过程中的活性基团是⋅OH和h ⁺。通过一级动力学模拟，反应速率常数7 ％ -WS ₂ / BiOCl为0.0155 min ^-1，是BiOCl的4.2倍。经过四个周期的实验，它仍然具有稳定的光催化活性。