在酸性条件下,与N/O协同作用的N/O链接的COF实现了超高和快速的Pd (II) 捕获
Yumei Luo1, Kaiyu Xia1, Yuancheng Qin1
1Key Laboratory of Jiangxi Province for Persistent Pollutants Prevention Control and Resource Reuse, Nanchang Hangkong University, Nanchang 330063, China.
Journal of hazardous materials
|February 4, 2026
概括
新的共价有机框架 (COF) 有效地从酸性废水中捕获 (Pd). 这些与联的COF具有高吸附能力,选择性和可回收性,可用于可持续的金属回收和环境清洁.
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:
- 选择性吸附 (Pd) 对于可持续的资源管理和环境保护至关重要.
- 酸性废水对高效的贵金属回收提出了挑战.
研究的目的:
- 合成新的共价有机框架 (COFs) 来从酸性溶液中选择性吸附 (Pd).
- 评估合成的COFs对Pd (II) 离子的吸附能力,动力学,选择性和可回收性.
主要方法:
- 合成含有化的氨基联结COF (BTHN和BTHO).
- 吸附实验以确定Pd的吸收能力,去除效率和动力学.
- 在有竞争性离子的情况下进行选择性测试.
- 在多个吸附-脱附周期中对可回收性进行评估.
- 进行X射线光电子光谱 (XPS) 和密度函数理论 (DFT) 分析以阐明吸附机制.
主要成果:
- 基功能化COF (BTHN) 在pH1.0下实现了898.09 mg/g的创纪录的Pd(II) 吸附能力.
- 在30分钟内实现了高Pd(II) 清除效率 (96.3%).
- 碳氧化具有很好的可回收性 (>5个循环后94%的去除率) 和选择性,即使有16个竞争性离子.
- 在连续流下,BTHN具有较高的动态吸附能力 (443.69 mg/g),并从真正的工业水中有效地回收Pd(II).
结论:
- 酸连接的COF,特别是BTHN,是从酸性废水中选择性Pd (II) 恢复的高效吸附剂.
- 增强的性能归因于协调丰富的孔隙环境与协同的N / O捐赠点和有利的静电相互作用.
- 这些COF显示出在高贵金属回收和在恶劣的酸性条件下环境修复中实际应用的巨大潜力.
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