在共价有机框架中和氧活性位点的协同效应,以实现高效的黄金回收
Xueling Qiao1, Liqin Hao1, Hongxia Ren1
1State Key Laboratory of Medicinal Chemical biology, College of Chemistry, Nankai University, Tianjin, 300071, China.
Angewandte Chemie (International ed. in English)
|May 23, 2025
概括
研究人员开发了先进的共价有机框架 (COF),使用和氧站点,以实现高效的黄金回收. 这些材料表现出优越的吸附能力,快速的动力学和出色的选择性,显示出电子废物回收利用的前景.
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:
- 高效的贵金属回收,特别是黄金,在吸附能力,动力学和选择性方面面临挑战.
- 经济和环境影响促使人们需要先进的黄金回收解决方案.
研究的目的:
- 设计和合成具有协同和氧活性位点的新型共价有机框架 (COF),以增强黄金吸附.
- 评估这些COF的吸附能力,动力学,选择性和实际应用潜力,用于黄金回收.
主要方法:
- 通过迈克尔的添加-消除反应合成两个与β-基因胺相关的COFs (NKCOF-77和-78).
- 使用实验技术和密度函数理论 (DFT) 计算进行全面的表征.
- 评估黄金吸附性能,包括容量,动力学和对竞争性离子的选择性.
主要成果:
- NKCOF-77显示出高吸附能力 (3225 mg g-1),超快的吸附动力学 (<5分钟),以及近乎完美的选择性 (>99.9%).
- 合成的COF从真正的电子废物解决方案中显示出出色的黄金回收.
- DFT的计算和实验数据证实了高密度和氧位点在增强黄金吸附中的关键作用.
结论:
- 开发的COF为贵金属吸附提供了一种新且高效的策略,特别是对于黄金.
- 这些材料显示出在黄金回收和电子废物回收等工业应用的巨大潜力.
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