In this paper, two metal compounds were combined and successfully prepared a Z-type BiOCl/NiAl-LDH(B/NL) heterojunction for the degradation of various antibiotics in industrial wastewater under visible light. The optical properties and photocatalytic activity of B/NL can be adjusted by varying the amount of NiAl-LDH. In the simulated degradation of tetracycline (TC) under visible light, B/NL-11 showed the best photodegradation efficiency, with a degradation rate of 92.57 % within 100 min. By using catalytic materials to degrade industrial wastewater, the degradation rate of tetracycline antibiotics (tetracycline, oxytetracycline) is more than 70 %, and the degradation rate of quinolone antibiotics (ciprofloxacin, norfloxacin) is more than 50 %. Mineralization process of the B/NL-11 system to degrade antibiotics in industrial wastewater was evaluated by 3D EMMS technology, and the degradation pathways were analyzed by LC-MS. The toxicity of the intermediate products produced is much lower than that of the pollutants themselves, and there is no secondary pollution. The degradation activity of BiOCl/NiAl-LDH is due to the construction of heterojunction adds many active sites, and the formed band structure promotes the efficient separation and transfer of photogenerated electron-holes. The free radical trapping experiment proved that h, ∙O, ∙OH was the main active substance in the degradation process, and finally proposed the Z-type heterojunction mechanism.

中文翻译：

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新型 Z 型 0D/2D BiOCl/NiAl-LDH 异质结用于工业废水中多种抗生素的光降解：降解途径和毒性分析

本文将两种金属化合物组合，成功制备了Z型BiOCl/NiAl-LDH(B/NL)异质结，用于可见光下降解工业废水中的多种抗生素。 B/NL的光学性质和光催化活性可以通过改变NiAl-LDH的量来调节。在可见光下模拟降解四环素（TC）时，B/NL-11表现出最佳的光降解效率，100 min内降解率为92.57%。采用催化材料降解工业废水，四环素类抗生素（四环素、土霉素）降解率达70%以上，喹诺酮类抗生素（环丙沙星、诺氟沙星）降解率达50%以上。利用3D EMMS技术评价B/NL-11系统降解工业废水中抗生素的矿化过程，并利用LC-MS分析降解途径。产生的中间产物的毒性远低于污染物本身，且不存在二次污染。 BiOCl/NiAl-LDH的降解活性是由于异质结的构建增加了许多活性位点，形成的能带结构促进了光生电子空穴的有效分离和转移。自由基捕获实验证明h、∙O、∙OH是降解过程中的主要活性物质，最终提出Z型异质结机理。