阳离子调节的离子共价有机框架,用于从电子废物中高度选择性地回收黄金
Jie Zhao1, Zelong Qiao1, Yuncheng He1
1State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
Angewandte Chemie (International ed. in English)
|September 9, 2024
概括
离子共价有机框架 (COF) 为从电子废物中回收黄金提供了可持续的解决方案. 这些COF中的阳离子调节显著提高了黄金的吸附性和选择性,为高效的回收利用铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 纳米技术 纳米技术
背景情况:
- 电子废物 (电子废物) 含有大量的黄金 (Au),超过天然矿石度.
- 高效的黄金回收对于化学工业和资源管理的可持续性至关重要.
研究的目的:
- 合成和评估离子共价有机框架 (COFs) 以有效地从电子废物中回收黄金.
- 调查离子调节对离子COF黄金吸附性能的影响.
主要方法:
- 使用离子调节策略合成一系列离子COF (离子-COF-X,其中X=Cl-, Br-, AcO-, SO42-).
- 评估黄金吸附效率,再生能力和对其他金属离子的选择性.
- 密度函数理论 (DFT) 计算,以了解黄金吸附的机制.
主要成果:
- 所有合成的离子COF都显示出超高的黄金吸附效率和出色的可回收性.
- 离子COF-Cl的黄金吸附能力达到了1270.8 mg/g.
- 在模拟的电子废物溶液中,离子COF-Cl对Au3+离子比Cu2+和Ni2+具有显著的选择性 (分别为39000x和4600x).
结论:
- 离子调节是设计高性能离子COF用于黄金回收的有效策略.
- 离子-COF-Cl作为从工业电子废物浸液中高选择性回收黄金的材料具有显著的前景.
- 这项研究为从电子废物流中可持续回收黄金提供了一个新的平台.
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