在酸性溶液中进行高度选择性的Au(III) 回收时,用四素功能化UiO-68
Zhuoran Sun1, Yali Ma1, Haijun Hu2
1College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, P. R. China. maylchem@syuct.edu.cn.
Dalton transactions (Cambridge, England : 2003)
|February 18, 2026
概括
一个新的四素功能化的金属有机框架 (MOF) 从酸性溶液中有效地回收金. 这种先进的MOF表现出高选择性和黄金回收能力,性能优于现有材料.
科学领域:
- 材料科学 材料科学 材料科学
- 无机化学 无机化学
- 环境化学环境化学
背景情况:
- 从酸性废物流中选择性回收黄金等贵金属 (III) 对资源可持续性和环境保护至关重要.
- 金属有机框架 (MOF) 提供可调节的结构和高表面积,使它们成为吸附性金属回收的有希望的候选者.
- MOFs的功能化可以增强它们对特定金属离子的亲和力和选择性.
研究的目的:
- 为了合成和表征四素功能化MOF (UiO-68-TZDC) 用于选择性Au(III) 恢复.
- 评估UiO-68-TZDC对Au的吸附能力,动力学,选择性和可重复使用性.
- 为了阐明Au(III) 吸附和减少由氨酸链接器的机制.
主要方法:
- 一溶热合成UiO-68-TZDC及其无素对应物UiO-68-TPDC.
- 使用诸如X射线衍射 (XRD) 和光谱等技术进行表征.
- 吸附实验以确定Au(III) 的吸收,动力学,选择性 (超过Fe(III),Cu(II) 和循环稳定性.
主要成果:
- UiO-68-TZDC的高和Au(III) 摄入量为404.4毫克g-1,明显超过UiO-68-TPDC (114.5毫克g-1).
- 吸附跟随伪二阶动力学,表明化学吸附和扩散控制,对Au的选择性很好.
- 经过多次吸附-脱附循环后,MOF保持了超过70%的容量,并通过氨酸连接器证明了Au(III) 到Au(0) 的部分降低.
结论:
- 在坚固的UiO-68框架中进行氨酸连接器工程是高性能Au(III) 吸附剂的有效策略.
- UiO-68-TZDC通过合作的"预缩-协调-减少"机制,从酸性化物介质中有效和选择性地回收Au(III).
- 这项工作为从工业废物流中回收黄金提供了一个有希望的方法.
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