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g-C3N4/Metal–Organic Framework Nanosheet/CuO Heterostructure for the Visible Photocatalytic Degradation of Tetracycline
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2024-01-10 , DOI: 10.1021/acsanm.3c04508 Xiangming Li 1 , Shirong Wang 1 , Dongcheng Ye 1 , Weishan Wen 1 , Haitao Li 2 , Zequn Ma 3 , Guanghuan Li 1 , Wen Fu 1 , Meng Fu 1
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2024-01-10 , DOI: 10.1021/acsanm.3c04508 Xiangming Li 1 , Shirong Wang 1 , Dongcheng Ye 1 , Weishan Wen 1 , Haitao Li 2 , Zequn Ma 3 , Guanghuan Li 1 , Wen Fu 1 , Meng Fu 1
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Developing highly efficient photocatalysts for the degradation of pharmaceutical and personal care product residues is of significance and challenge. Herein, a graphitic carbon nitride (g-C3N4)/metal–organic framework (MOF) nanosheet/CuO heterostructure was successfully constructed via electrostatic self-assembly and in situ growth strategies. The heterostructure at ultralow doses (6 mg) displayed the highest tetracycline (TC, 20 mg/L) degradation efficiency of 78.8% under visible light within 27 min. Moreover, this heterostructure maintained a good TC degradation efficiency after four cycles. Experimental data and density functional theory calculations demonstrate that the good photocatalytic performance of the as-prepared heterostructure is attributed to the positively charged MOF sheet interlayer and the coupling effect between the g-C3N4, MOF nanosheet and CuO, which can enrich electrons, ions, molecules, and block holes to greatly improve the rapid separation of photogenerated carriers from g-C3N4 or CuO and the adsorption of reactants. The types of reactive oxygen species and effects of inorganic ions on photocatalytic performance were further studied. This work presented a novel strategy to construct a self-assembled heterostructure for visible photocatalytic applications.
中文翻译：
g-C3N4/金属有机框架纳米片/CuO异质结构用于可见光催化降解四环素
开发高效光催化剂来降解药物和个人护理产品残留物具有重要意义和挑战。在此，通过静电自组装和原位生长策略成功构建了石墨碳氮化物（gC 3 N 4 ）/金属有机框架（MOF）纳米片/CuO异质结构。超低剂量（6 mg）的异质结构在可见光下27分钟内显示出最高的四环素（TC，20 mg/L）降解效率，达到78.8%。此外，该异质结构在四次循环后仍保持良好的TC降解效率。实验数据和密度泛函理论计算表明，所制备的异质结构良好的光催化性能归因于带正电的MOF片中间层以及gC 3 N 4、MOF纳米片和CuO之间的耦合效应，可以富集电子、离子、分子和阻挡空穴，大大提高光生载流子与gC 3 N 4或CuO的快速分离以及反应物的吸附。进一步研究了活性氧的类型和无机离子对光催化性能的影响。这项工作提出了一种构建用于可见光催化应用的自组装异质结构的新策略。
更新日期：2024-01-10
中文翻译：
g-C3N4/金属有机框架纳米片/CuO异质结构用于可见光催化降解四环素
开发高效光催化剂来降解药物和个人护理产品残留物具有重要意义和挑战。在此，通过静电自组装和原位生长策略成功构建了石墨碳氮化物（gC 3 N 4 ）/金属有机框架（MOF）纳米片/CuO异质结构。超低剂量（6 mg）的异质结构在可见光下27分钟内显示出最高的四环素（TC，20 mg/L）降解效率，达到78.8%。此外，该异质结构在四次循环后仍保持良好的TC降解效率。实验数据和密度泛函理论计算表明，所制备的异质结构良好的光催化性能归因于带正电的MOF片中间层以及gC 3 N 4、MOF纳米片和CuO之间的耦合效应，可以富集电子、离子、分子和阻挡空穴，大大提高光生载流子与gC 3 N 4或CuO的快速分离以及反应物的吸附。进一步研究了活性氧的类型和无机离子对光催化性能的影响。这项工作提出了一种构建用于可见光催化应用的自组装异质结构的新策略。
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