通过曼尼赫聚合,通过稳定的烯胺链接共价有机框架,从复杂的电子废物液中有效地回收黄金
Rui Zhang1, Cheng-Peng Niu1, Nai-Huai Dong1
1School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, China.
Angewandte Chemie (International ed. in English)
|June 27, 2025
概括
新的共价有机框架 (COF) 与烯胺链接为高效的黄金回收提供了增强的稳定性和选择性. 这些材料在从电子废弃物中提取Au3+方面表现出很高的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 化学 化学 化学
- 环境科学 环境科学
背景情况:
- 共价有机框架 (COF) 对资源回收至关重要,但往往缺乏稳定性和选择性.
- 从电子垃圾等复杂基质中有效地回收黄金仍然是一个重大挑战.
研究的目的:
- 开发新的与烯胺结合的COF,以提高Au3+捕获的稳定性和选择性.
- 为了研究结构-属性关系,控制COF在金属回收中的性能.
主要方法:
- 1,3,5-triformylbenzene,Meldrum的酸,和芳香胺的一步曼尼赫型的三组分聚合.
- 描述COF的结晶性,多孔性和在恶劣条件下的稳定性.
- 通过结和化,使用双协调位点 (CO和N─H) 的选择性Au3+结合的评估.
主要成果:
- 一系列稳定的烯胺结合COFs (TFB-PD-M,TFB-ND-M,TFB-AD-M) 被合成,具有增强的π-结合和骨干刚性.
- 这些COF表现出高结晶度,永久多孔性和特殊的化学/热稳定性.
- TFB-AD-M实现了98.5%的选择性Au3+从电子废弃物液中回收,表现优于竞争对手的金属离子.
结论:
- 烯胺链接提供了一个强大的策略来增强COF的稳定性和功能.
- 开发的COF对选择性黄金回收非常有效,为电子废物回收利用提供了可持续的解决方案.
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