Citation: Bo Li, Yuanzhe Cheng, Xuyang Ma, Dongxu Zhao, Yang Zhang, Yongxing Sun, Jia Chen, Li Wu, Liang Zhao, Hongdeng Qiu, Yujian He. Facile and scale-up synthesis of cyano-functionalized covalent organic frameworks for selective gold recovery[J]. Chinese Chemical Letters, ;2026, 37(1): 111134. doi: 10.1016/j.cclet.2025.111134 shu

Facile and scale-up synthesis of cyano-functionalized covalent organic frameworks for selective gold recovery

Bo Li ^{a, b} ,
Yuanzhe Cheng ^a ,
Xuyang Ma ^a ,
Dongxu Zhao ^a ,
Yang Zhang ^a ,
Yongxing Sun ^b ,
Jia Chen ^{b, *,} ,
Li Wu ^a ,
Liang Zhao ^b ,
Hongdeng Qiu ^{b, *,} ,
Yujian He ^{a, *,}

a.
School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
b.
CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China

jiachen@licp.cas.cn

hdqiu@licp.cas.cn

heyujian@ucas.ac.cn

Received Date: 9 January 2025
Revised Date: 11 March 2025
Accepted Date: 20 March 2025
Available Online: 20 March 2025

Figures(5)

The recovery of gold from waste electronic and electric equipment (WEEE) has gained great attention with the increased number of WEEE, because it can largely alleviate the pressure on the environment and resources. Covalent organic frameworks (COFs) are ideal adsorbents for gold recovery owing to their large surface area, good stability, easily functionalized ability, periodic structures, and definitive nanopores. Herein, a cyano-functionalized COF (COF-CN) with high crystallinity was large-scale prepared under mild conditions for the recovery of gold. The introduction of cyano groups enable COF-CN to exhibit excellent gold recovery performance, which possesses fast adsorption kinetics, high cycling stability, and adsorption capacity up to 663.67 mg/g. Excitingly, COF-CN showed extremely high selectivity for gold ions, even in the presence of various competing cations and anions. The COF-CN maintained excellent selectivity and removal efficiency in gold recovery experiments from WEEE. The facile synthesis of COF-CN and its outstanding selectivity in actual samples make it an attractive opportunity for practical gold recovery.
- Cyano functionalization,
- Gold recovery,
- Covalent organic frameworks,
- Waste electronic and electric equipment,
- Selectivity
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