Synergistic Effects of Nitrogen and Oxygen Active Sites in Covalent Organic Frameworks for Highly Efficient Gold Recovery
Xueling Qiao
State Key Laboratory of Medicinal Chemical biology, College of Chemistry, Nankai University, Tianjin, 300071 China
Search for more papers by this authorLiqin Hao
State Key Laboratory of Medicinal Chemical biology, College of Chemistry, Nankai University, Tianjin, 300071 China
Search for more papers by this authorHongxia Ren
State Key Laboratory of Medicinal Chemical biology, College of Chemistry, Nankai University, Tianjin, 300071 China
Search for more papers by this authorEn Lin
State Key Laboratory of Medicinal Chemical biology, College of Chemistry, Nankai University, Tianjin, 300071 China
Search for more papers by this authorJixian Wang
State Key Laboratory of Medicinal Chemical biology, College of Chemistry, Nankai University, Tianjin, 300071 China
Search for more papers by this authorKaiyuan Wang
State Key Laboratory of Medicinal Chemical biology, College of Chemistry, Nankai University, Tianjin, 300071 China
Search for more papers by this authorProf. Peng Cheng
State Key Laboratory of Medicinal Chemical biology, College of Chemistry, Nankai University, Tianjin, 300071 China
Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, Frontiers Science, Center for New Organic Matter, Nankai University, Tianjin, 300071 China
Search for more papers by this authorProf. Yao Chen
State Key Laboratory of Medicinal Chemical biology, College of Chemistry, Nankai University, Tianjin, 300071 China
Nankai International Advanced Research Institute (Shenzhen Futian), Nankai University, Tianjin, 300071 China
Search for more papers by this authorCorresponding Author
Prof. Zhenjie Zhang
State Key Laboratory of Medicinal Chemical biology, College of Chemistry, Nankai University, Tianjin, 300071 China
Nankai International Advanced Research Institute (Shenzhen Futian), Nankai University, Tianjin, 300071 China
Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, Frontiers Science, Center for New Organic Matter, Nankai University, Tianjin, 300071 China
E-mail: [email protected]
Search for more papers by this authorXueling Qiao
State Key Laboratory of Medicinal Chemical biology, College of Chemistry, Nankai University, Tianjin, 300071 China
Search for more papers by this authorLiqin Hao
State Key Laboratory of Medicinal Chemical biology, College of Chemistry, Nankai University, Tianjin, 300071 China
Search for more papers by this authorHongxia Ren
State Key Laboratory of Medicinal Chemical biology, College of Chemistry, Nankai University, Tianjin, 300071 China
Search for more papers by this authorEn Lin
State Key Laboratory of Medicinal Chemical biology, College of Chemistry, Nankai University, Tianjin, 300071 China
Search for more papers by this authorJixian Wang
State Key Laboratory of Medicinal Chemical biology, College of Chemistry, Nankai University, Tianjin, 300071 China
Search for more papers by this authorKaiyuan Wang
State Key Laboratory of Medicinal Chemical biology, College of Chemistry, Nankai University, Tianjin, 300071 China
Search for more papers by this authorProf. Peng Cheng
State Key Laboratory of Medicinal Chemical biology, College of Chemistry, Nankai University, Tianjin, 300071 China
Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, Frontiers Science, Center for New Organic Matter, Nankai University, Tianjin, 300071 China
Search for more papers by this authorProf. Yao Chen
State Key Laboratory of Medicinal Chemical biology, College of Chemistry, Nankai University, Tianjin, 300071 China
Nankai International Advanced Research Institute (Shenzhen Futian), Nankai University, Tianjin, 300071 China
Search for more papers by this authorCorresponding Author
Prof. Zhenjie Zhang
State Key Laboratory of Medicinal Chemical biology, College of Chemistry, Nankai University, Tianjin, 300071 China
Nankai International Advanced Research Institute (Shenzhen Futian), Nankai University, Tianjin, 300071 China
Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, Frontiers Science, Center for New Organic Matter, Nankai University, Tianjin, 300071 China
E-mail: [email protected]
Search for more papers by this authorAbstract
Developing efficient adsorbents for precious metals, especially gold recovery, necessitates the integration of multiple critical properties, including high adsorption capacity, rapid adsorption kinetics, and exceptional selectivity, posing significant scientific challenges with substantial economic and environmental implications. Herein, we report a strategy to achieve highly efficient gold adsorption through synergistic effects of nitrogen and oxygen active sites into covalent organic frameworks (COFs). Two β-ketoenamine-linked COFs (NKCOF-77 and -78) with high-density nitrogen/oxygen active sites are rationally designed and synthesized via a Michael addition-elimination reaction approach. Notably, the comprehensive gold recovery performance for NKCOF-77 is among the best in the COF field, with the third highest adsorption capacity (up to 3225 mg g−1), ultrafast adsorption kinetics (<5 min), and near-perfect selectivity (>99.9% with 10 competitive cations and anions). Moreover, the COFs show exceptional ability for gold recovery from real e-waste solutions, demonstrating tremendous practical application potential. Various experimental characterization and density functional theory calculations reveal that strategically incorporating high-density nitrogen and oxygen active sites is crucial in significantly enhancing the gold adsorption capacity. This work provides a novel strategy for designing COFs as precious metal adsorbents, highlighting their promising potential for industrial applications.
Conflict of Interests
The authors declare no conflict of interest.
Open Research
Data Availability Statement
The data that support the findings of this study are available in the Supporting Information of this article.
Supporting Information
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| ange202508162-sup-0001-SuppMat.docx14.8 MB | Supporting Information |
Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
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