Zadehnazari Amin, Auras Florian, Altaf Ataf Ali, Zarei Amin, Khosropour Ahmadreza, Amirjalayer Saeed, Abbaspourrad Alireza
Department of Food Science, College of Agricultural and Life Sciences, Cornell University, Stocking Hall, Ithaca, NY, USA.
Faculty of Chemistry and Food Chemistry, TUD Dresden University of Technology, Dresden, Germany.
Nat Commun. 2024 Dec 30;15(1):10846. doi: 10.1038/s41467-024-55156-3.
The rising demand for gold requires innovative methods for its recovery from e-waste. Here we present the synthesis of two tetrazine-based vinyl-linked covalent organic frameworks: TTF-COF and TPE-COF that adsorb gold ions and nanoparticles and catalyze the carboxylation of terminal alkynes. These covalent organic frameworks have low band gaps and high photocurrent responses. TTF-COF has an adsorption capacity toward aqueous Au(III) of 2440 mg g, and TPE-COF's Au(III) adsorption capacity is 1639 mg g. The gold source is metal flakes isolated from waste computer processing units. Of the gold present, > 99% is selectively captured by TTF-COF whereas only 5% of the Ni and 2% of the Cu in the solution is adsorbed. The Au-loaded covalent organic frameworks catalyze the carboxylation of terminal alkynes and are stable and reusable for six reuse cycles. Our covalent organic frameworks convert e-waste into a valuable catalyst for a useful green organic transformation.
对黄金不断增长的需求需要创新方法从电子垃圾中回收黄金。在此，我们展示了两种基于四嗪的乙烯基连接的共价有机框架的合成：TTF-COF和TPE-COF，它们能吸附金离子和纳米颗粒，并催化末端炔烃的羧化反应。这些共价有机框架具有低带隙和高光电流响应。TTF-COF对水相Au(III)的吸附容量为2440 mg g，TPE-COF的Au(III)吸附容量为1639 mg g。金源是从废弃计算机处理单元中分离出的金属薄片。在存在的金中，>99%被TTF-COF选择性捕获，而溶液中只有5%的镍和2%的铜被吸附。负载金的共价有机框架催化末端炔烃的羧化反应，并且稳定且可重复使用六个循环。我们的共价有机框架将电子垃圾转化为用于有用的绿色有机转化的有价值催化剂。
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