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2D/2D Bi2MoO6/CoAl LDH S-scheme heterojunction for enhanced removal of tetracycline: Performance, toxicity, and mechanism
Chemosphere ( IF 8.1 ) Pub Date : 2023-12-12 , DOI: 10.1016/j.chemosphere.2023.140932 Huiyin Ye 1 , Yidan Luo 2 , Shuohan Yu 3 , Guangying Shi 1 , Aofeng Zheng 1 , Yong Huang 1 , Mingshan Xue 1 , Zuozhu Yin 1 , Zhen Hong 1 , Xibao Li 1 , Xianchuan Xie 4 , Bin Gao 5
Chemosphere ( IF 8.1 ) Pub Date : 2023-12-12 , DOI: 10.1016/j.chemosphere.2023.140932 Huiyin Ye 1 , Yidan Luo 2 , Shuohan Yu 3 , Guangying Shi 1 , Aofeng Zheng 1 , Yong Huang 1 , Mingshan Xue 1 , Zuozhu Yin 1 , Zhen Hong 1 , Xibao Li 1 , Xianchuan Xie 4 , Bin Gao 5
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In this paper, the two-dimensional (2D) layered CoAl LDH (CoAl) was coupled with BiMoO (BMO) nanoplate and used for tetracycline (TC) degradation. Based on the results of UV–visible diffuse reflectance spectrum (UV–vis DRS), Motty-Schottky curves, and in situ X-ray photoelectron spectroscopy (XPS), a novel 2D/2D BiMoO/CoAl LDH S-scheme heterojunction photocatalyst was built. The photodegradation rate constant of TC by the optimized sample BMO/CoAl30 was 3.637 × 10 min, which was 1.26 times and 4.01 times higher than that of BiMoO and CoAl LDH, respectively. The favorable photocatalytic performance of the heterojunction was attributed to the increased interfacial contact area of the 2D/2D structure. Besides, the transfer of photogenerated electrons from BiMoO to CoAl LDH under the effect of the built-in electric field (BIEF) reduced the recombination of photogenerated carriers and further improved the photocatalytic performance. The reactive species of h, ·O, and O exhibited critical roles to degrade TC molecules by reactive radicals capture experiments and electron spin resonance (ESR) tests. The intermediate products of TC degradation and toxicity of intermediates were analyzed by liquid chromatography-mass spectrometer (LC-MS) and Toxicity Estimation Software Tool (T.E.S.T). Additionally, the BMO/CoAl composite photocatalysts showed high stability and environmental tolerance during the testing of cycles and environmental impacts with various water sources, organic contaminants, initial pH, and inorganic ions. This work provides a new protocol for designing and constructing novel 2D/2D S-scheme heterojunction photocatalysts for wastewater treatment.
中文翻译：
用于增强四环素去除的 2D/2D Bi2MoO6/CoAl LDH S 型异质结：性能、毒性和机制
在本文中，二维（2D）层状CoAl LDH（CoAl）与BiMoO（BMO）纳米板偶联并用于四环素（TC）降解。基于紫外可见漫反射光谱（UV-vis DRS）、Motty-Schottky 曲线和原位 X 射线光电子能谱（XPS）的结果，我们制备了一种新型 2D/2D BiMoO/CoAl LDH S 型异质结光催化剂。建造的。优化后的样品BMO/CoAl30对TC的光降解速率常数为3.637×10 min，分别是BiMoO和CoAl LDH的1.26倍和4.01倍。异质结良好的光催化性能归因于2D/2D结构的界面接触面积的增加。此外，在内建电场（BIEF）的作用下，光生电子从BiMoO转移到CoAl LDH，减少了光生载流子的复合，进一步提高了光催化性能。通过反应自由基捕获实验和电子自旋共振 (ESR) 测试，h、·O 和 O 的活性物质在降解 TC 分子方面表现出关键作用。采用液相色谱-质谱联用仪(LC-MS)和毒性估算软件工具(TEST)对TC降解的中间产物和中间体的毒性进行了分析。此外，BMO/CoAl复合光催化剂在各种水源、有机污染物、初始pH和无机离子的循环和环境影响测试中表现出高稳定性和环境耐受性。这项工作为设计和构建用于废水处理的新型 2D/2D S 型异质结光催化剂提供了新的方案。
更新日期：2023-12-12
中文翻译：
用于增强四环素去除的 2D/2D Bi2MoO6/CoAl LDH S 型异质结：性能、毒性和机制
在本文中，二维（2D）层状CoAl LDH（CoAl）与BiMoO（BMO）纳米板偶联并用于四环素（TC）降解。基于紫外可见漫反射光谱（UV-vis DRS）、Motty-Schottky 曲线和原位 X 射线光电子能谱（XPS）的结果，我们制备了一种新型 2D/2D BiMoO/CoAl LDH S 型异质结光催化剂。建造的。优化后的样品BMO/CoAl30对TC的光降解速率常数为3.637×10 min，分别是BiMoO和CoAl LDH的1.26倍和4.01倍。异质结良好的光催化性能归因于2D/2D结构的界面接触面积的增加。此外，在内建电场（BIEF）的作用下，光生电子从BiMoO转移到CoAl LDH，减少了光生载流子的复合，进一步提高了光催化性能。通过反应自由基捕获实验和电子自旋共振 (ESR) 测试，h、·O 和 O 的活性物质在降解 TC 分子方面表现出关键作用。采用液相色谱-质谱联用仪(LC-MS)和毒性估算软件工具(TEST)对TC降解的中间产物和中间体的毒性进行了分析。此外，BMO/CoAl复合光催化剂在各种水源、有机污染物、初始pH和无机离子的循环和环境影响测试中表现出高稳定性和环境耐受性。这项工作为设计和构建用于废水处理的新型 2D/2D S 型异质结光催化剂提供了新的方案。
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