从电子废物中选择性回收黄金,使用高度稳定的多孔芳香框架/聚合物,并将其应用于CO2电还原
Tianwei Xue1, Guangkuo Xu1, Chengbin Liu1
1Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China.
Angewandte Chemie (International ed. in English)
|February 17, 2025
概括
本研究引入了一种新的多孔芳香框架 (PAF) /聚合物复合物,用于有效地从电子废物中回收黄金. 该材料具有高吸附能力和选择性提取,可实现可持续的资源管理和二氧化碳转化.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 电化学 电化学 电化学
背景情况:
- 电子垃圾 (e-waste) 由于其含有贵重金属,给环境带来了重大挑战.
- 从电子垃圾中回收黄金等贵金属的可持续发展方法对于资源保护和减少废物至关重要.
- 现有的黄金回收技术往往缺乏效率,选择性或环保性.
研究的目的:
- 设计和合成一种新的多孔芳香框架 (PAF) /聚合物复合物,用于从电子废物中选择性回收黄金.
- 评估开发的金复合材料的吸附性能,包括容量和动力学.
- 证明复合材料在从真实电子废弃物液中回收黄金的实际应用及其随后在电催化二氧化碳减少中的使用.
主要方法:
- 一种多孔芳香框架 (PAF-147) 的合成及其随后与多多巴胺 (PDA) 的复合物形成.
- 描述PAF-147/PDA复合物的结构和性能.
- 在各种pH条件和接触时间下进行黄金吸附实验.
- 装有黄金的复合材料在电催化二氧化碳减排中的应用.
主要成果:
- 合成的PAF-147/PDA复合物表现出高的最大黄金吸附能力,达到1700mg/g.
- 超过95%的黄金被快速提取在2分钟内在广泛的pH范围 (0-10).
- 复合材料成功地从废弃的中央加工单元漏液中恢复了99%的黄金.
- 在复合材料中集成的回收黄金,在二氧化碳电还原过程中实现了超过95%的法拉第克效率.
结论:
- PAF-147/PDA复合物是一种高效和选择性的吸附剂,用于从电子废物中回收黄金.
- 这种材料为资源回收和废物利用提供了可持续的解决方案.
- 该研究提出了一种新的方法,将选择性黄金回收与高效的电催化二氧化碳转化相结合,为循环经济战略开辟了新的途径.
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