In this research, a group of BiOX (Cl:Br) nanosheet solid solution with various Cl/Br molar ratios have been fabricated using a facile one-pot in-situ thermal-sonication method. The crystal phases structure, elemental composition, morphology, specific surface area and optical features of as-synthesized photocatalyst were explored by XRD, EDX, FESEM, HRTEM, AFM, BET-BJH, and DRS techniques. The photocatalytic activity of nanophotocatalysts was investigated by photodegradation of ciprofloxacin as a model pharmaceutical pollutant under simulated solar light illumination. The scavenging effect was studied by using Triethanolamine and 2-propanol to evaluate the roles of holes and hydroxyl radicals as main active species. All the samples showed higher photocatalytic activity compared to pristine BiOCl and BiOBr. The solid solutions, BiOX (Cl:Br=1:3)-U sample exhibited excellent photocatalytic performance by 100% degradation efficiency of ciprofloxacin within 120 min. The outstanding photocatalytic activity of BiOX (Cl:Br=1:3)-U might be ascribed to the large specific surface area, suitable morphology and band gap, effective separation of the photo-generated electron-hole pairs and the existence of the meso-size pores in structure. Moreover, results demonstrated that the presence of ultrasound irradiations and generated microjets during the synthesis step could appreciably improve the photocatalytic performance. After 4 cycles, there was no significant change in photocatalytic activity that confirms the high stability of BiOX (Cl:Br=1:3)-U mesoporous nanophotocatalyst. Besides, the influence of operating parameters on the degradation efficiency and the possible photocatalytic mechanism was examined.

在这项研究中，使用方便的一锅式原位热超声方法制备了一组具有各种Cl / Br摩尔比的BiOX（Cl：Br）纳米片固溶体。通过XRD，EDX，FESEM，HRTEM，AFM，BET-BJH和DRS技术探索了合成光催化剂的晶相结构，元素组成，形态，比表面积和光学特性。通过环丙沙星作为模型药物污染物的光降解，在模拟太阳光下研究了纳米光催化剂的光催化活性。通过使用三乙醇胺和2-丙醇研究清除作用，以评估空穴和羟基自由基作为主要活性物质的作用。与原始的BiOCl和BiOBr相比，所有样品均显示出更高的光催化活性。固溶体BiOX（Cl：Br = 1：3）-U样品在120分钟内以100％的环丙沙星降解效率表现出优异的光催化性能。BiOX（Cl：Br = 1：3）-U的杰出光催化活性可能归因于较大的比表面积，合适的形貌和带隙，有效分离光生电子-空穴对以及内消旋体的存在毛孔粗大。此外，结果表明，在合成步骤中超声辐射和产生的微射流的存在可以明显改善光催化性能。在4个循环后，光催化活性没有明显变化，证实了BiOX（Cl：Br = 1：3）-U介孔纳米光催化剂的高稳定性。除了，