Volume 9, Issue 7 2401792
Research Article

Imidazopyridinium-Linked Covalent Organic Frameworks for Efficient Gold Recovery

Xiubei Yang

Xiubei Yang

CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute (SARI), Chinese Academy of Sciences (CAS), Shanghai, 201210 P. R. China

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Di Jiang

Di Jiang

CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190 P. R. China

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Yuanzhe Cheng

Yuanzhe Cheng

CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190 P. R. China

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Yubin Fu

Yubin Fu

Center for Advancing Electronics Dresden (cfaed) & Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062 Dresden, Germany

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Xuewen Li

Xuewen Li

CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute (SARI), Chinese Academy of Sciences (CAS), Shanghai, 201210 P. R. China

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Guojuan Liu

Guojuan Liu

CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute (SARI), Chinese Academy of Sciences (CAS), Shanghai, 201210 P. R. China

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Xuesong Ding

Xuesong Ding

CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190 P. R. China

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Bao-Hang Han

Corresponding Author

Bao-Hang Han

CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190 P. R. China

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

E-mail: [email protected]; [email protected]; [email protected]

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Qing Xu

Corresponding Author

Qing Xu

CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute (SARI), Chinese Academy of Sciences (CAS), Shanghai, 201210 P. R. China

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

E-mail: [email protected]; [email protected]; [email protected]

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Gaofeng Zeng

Corresponding Author

Gaofeng Zeng

CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute (SARI), Chinese Academy of Sciences (CAS), Shanghai, 201210 P. R. China

University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

E-mail: [email protected]; [email protected]; [email protected]

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First published: 01 December 2024
Citations: 7

Abstract

Covalent organic frameworks (COFs) with high surface areas and specialized binding sites garnered attention in the field of gold (Au) adsorption. The adsorption capacity mostly depends on the functional skeletons and porous structures, however, the roles of linkages have not been thoroughly explored. In this study, imidazopyridinium-linked COFs, specifically im-PYTA-PZDH-COF and im-PYTA-BPDH-COF were synthesized, to enhance gold adsorption efficacy. These engineered COFs exhibit excellent crystallinity and high surface areas, with the charged linkages demonstrating a strong binding ability for Au, which results in high Au uptake and rapid adsorption kinetics. The optimized COF, im-PYTA-PZDH-COF, offered a maximum adsorption capacity of 1558 mg g−1, achieving 95% of this capacity within a mere 10 min. Theoretical calculations further confirm that the carbon atoms adjacent to the nitrogen in the imidazopyridinium ring, serving as adsorption sites, directly interact with AuCl4 through coulombic forces, thereby enhancing both the adsorption capacity and rate. This work provides a new strategy for designing COFs for effective Au adsorption.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the supplementary material of this article.

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