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Internal Electric-Field-Driven CoAl-LDH Coupled N-Rich Carbon Nitride of C3N5 for Improved Photocatalytic Performance
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2023-01-26 , DOI: 10.1021/acs.iecr.2c04227 Lixu Wu 1 , Chun Sun 1 , Shancheng Jiao 2 , Jun Hu 1 , Jia Yang 1 , Feipeng Jiao 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2023-01-26 , DOI: 10.1021/acs.iecr.2c04227 Lixu Wu 1 , Chun Sun 1 , Shancheng Jiao 2 , Jun Hu 1 , Jia Yang 1 , Feipeng Jiao 1
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Preparing photocatalysts with excellent performance to degrade organic pollutants in water is still a great challenge. Herein, we prepared CoAl-layered double hydroxide (LDH) coupled N-rich carbon nitride of C3N5 materials to investigate the feasibility of preparing materials for photocatalytic treatment of organic pollutants under natural water bodies. After 120 min of light exposure, the CoAl-LDH/C3N5 (CCN-100) composite showed optimal photocatalytic degradation performance, in which the degradation efficiency reached 94.02% in pure water and 91.85% in Xiangjiang water. Three possible photocatalytic degradation pathways of tetracycline were analyzed by liquid chromatography with tandem mass spectrometry. The toxicity of the intermediates was assessed by toxicity assessment software. The results showed that the toxicity of the intermediates was greatly reduced. We analyzed the formation of the internal electric field and the direction of charge migration in the CoAl-LDH/C3N5 heterojunction by the difference in the work function and the energy band structure of CoAl-LDH and C3N5. According to various characterization analysis and experimental results, the internal electric field formed between CoAl-LDH and C3N5 accelerates the charge transfer and the rapid separation of photogenerated electron holes thus improving the photocatalytic degradation performance. This study provides new insights into the effective removal of organic pollutants from water through the formation of an internal electric field in CoAl-LDH/C3N5 heterojunction.
中文翻译：
内部电场驱动的 CoAl-LDH 耦合 C3N5 的富氮碳氮化物以提高光催化性能
制备具有优异性能的光催化剂来降解水中的有机污染物仍然是一个巨大的挑战。在此，我们制备了CoAl层状双氢氧化物（LDH）偶联的C 3 N 5富氮碳氮化物材料，以探讨制备用于光催化处理自然水体下有机污染物材料的可行性。曝光 120 分钟后，CoAl-LDH/C 3 N 5(CCN-100)复合材料表现出最佳的光催化降解性能，其中在纯水中的降解效率达到94.02%，在湘江水中的降解效率达到91.85%。采用液相色谱串联质谱法分析了四环素的三种可能的光催化降解途径。中间体的毒性通过毒性评价软件进行评价。结果表明中间体的毒性大大降低。我们通过CoAl-LDH和C 3 N 5功函数和能带结构的差异分析了CoAl-LDH/C 3 N 5异质结内部电场的形成和电荷迁移的方向. 根据各种表征分析和实验结果，CoAl-LDH与C 3 N 5之间形成的内电场加速了电荷转移和光生电子空穴的快速分离，从而提高了光催化降解性能。该研究为通过在CoAl-LDH/C 3 N 5异质结中形成内电场有效去除水中有机污染物提供了新的见解。
更新日期：2023-01-26
中文翻译：
内部电场驱动的 CoAl-LDH 耦合 C3N5 的富氮碳氮化物以提高光催化性能
制备具有优异性能的光催化剂来降解水中的有机污染物仍然是一个巨大的挑战。在此，我们制备了CoAl层状双氢氧化物（LDH）偶联的C 3 N 5富氮碳氮化物材料，以探讨制备用于光催化处理自然水体下有机污染物材料的可行性。曝光 120 分钟后，CoAl-LDH/C 3 N 5(CCN-100)复合材料表现出最佳的光催化降解性能，其中在纯水中的降解效率达到94.02%，在湘江水中的降解效率达到91.85%。采用液相色谱串联质谱法分析了四环素的三种可能的光催化降解途径。中间体的毒性通过毒性评价软件进行评价。结果表明中间体的毒性大大降低。我们通过CoAl-LDH和C 3 N 5功函数和能带结构的差异分析了CoAl-LDH/C 3 N 5异质结内部电场的形成和电荷迁移的方向. 根据各种表征分析和实验结果，CoAl-LDH与C 3 N 5之间形成的内电场加速了电荷转移和光生电子空穴的快速分离，从而提高了光催化降解性能。该研究为通过在CoAl-LDH/C 3 N 5异质结中形成内电场有效去除水中有机污染物提供了新的见解。
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