Insights into the adsorption performance and mechanism of novel 3D bimetallic MOF nanosheets for the high-efficient removal of 6PPD and 6PPD-quinone

文献类型： 外文期刊

第一作者： Wu, Nannan

作者： Wu, Nannan;Wang, Jiao;Liu, Zhenzhen;Zhao, Huiyu;Di, Shanshan;Wang, Zhiwei;Wang, Xinquan;Qi, Peipei;Zheng, Bing;Zheng, Bing;Di, Shanshan;Wang, Zhiwei;Wang, Xinquan;Qi, Peipei;Di, Shanshan;Wang, Zhiwei;Wang, Xinquan;Qi, Peipei

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关键词： 3D bimetallic MOFs; 6PPD; 6PPD-quinone; Adsorption mechanism; DFT calculations

期刊名称：SEPARATION AND PURIFICATION TECHNOLOGY （ 影响因子：8.1； 五年影响因子：7.6 ）

ISSN： 1383-5866

年卷期： 2025 年 354 卷

页码：

收录情况： SCI

摘要： N-(1,3-dimethylbutyl)-N '-phenyl-p-phenylenediamine (6PPD) is commonly used as the tire rubber antioxidant, causing widespread contamination in water environments. Moreover, its derivative 6PPD-quinone (6PPD-Q) has been identified as highly toxic to aquatic organisms. Therefore, the urgent environmental concern revolves around the elimination of 6PPD and 6PPD-Q from aquatic settings. In this study, a highly effective 3D bimetallic nanosheet material was initially synthesized for the adsorptive removal of 6PPD and 6PPD-Q. The 3D bimetallic nanosheet materials, Al-TCPP-M (M = Co, Cu, Zn), were prepared by the two-step sequential process, displaying excellent adsorption performance with rates exceeding 97% and 98% for 6PPD and 6PPD-Q, respectively. The bimetallic and lamellar structure significantly enhanced the maximum adsorption capacities of Al-TCPP-M (M = Co, Cu, Zn) for 6PPD and 6PPD-Q reaching 331.9-355.9 mg/g and 260.6-335.0 mg/g, respectively. Findings from kinetics and thermodynamics suggested that monolayer adsorption was predominant, primarily driven by chemical adsorption. Additionally, the Al-TCPP-M nanosheets exhibited remarkable reusability and antiinterference ability, and achieved significant removal efficiencies for 6PPD and 6PPD-Q in real river water samples. Furthermore, probable adsorption mechanisms mainly involved hydrogen bonding, electrostatic interactions and it-it stacking. Density functional theory (DFT) calculations proved that the introduction of the second metal increased adsorption active sites of Al-TCPP-M through the formation of it-complexation between transition metals and 6PPD and 6PPD-Q. This research highlights the promising applications of 3D bimetallic MOF nanosheets in environmental remediation.

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