以结构为导向的金属有机框架激活通过近接的奥利高基四角接种 增强长链PFAS吸附
Jinming Luo1, Fang Luo1, Hao Li1
1State Key Laboratory of Green Papermaking and Resource Recycling, School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P.R. China.
Angewandte Chemie (International ed. in English)
|September 25, 2025
概括
一种新的基金属有机框架 (Zr-MOF) 吸附剂,UiO-66-L3,有效地去除长链基和多基物质 (PFAS),使用一种新的表面接种策略来增强污染物捕获.
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:
- 基于的金属有机框架 (Zr-MOFs) 对污染物去除具有前景,但在长链和多基物质 (PFAS) 的功能和主机-客户互动方面存在局限性.
- 目前的Zr-MOF设计在受限的微孔可访问性和薄弱的结合亲和性方面扎,阻碍了像PFAS这样的持久有机污染物的有效捕获.
研究的目的:
- 开发Zr-MOF的结构导向设计,以增强捕获长链PFAS.
- 通过创建一个表面局部化的寡合体功能化策略来克服传统接种方法的局限性.
主要方法:
- 使用局部表面的寡合体接种策略,将UiO-66-NH2与Oligoalkyl-quaternary ammonium (PAOQ) 基因功能化,从而产生UiO-66-L3吸附剂.
- 密度函数理论 (DFT) 的计算被用来研究电子相互作用和选择性机制.
主要成果:
- 与传统方法相比,UiO-66-L3吸附剂的功能组负荷增加了2.2倍.
- 对于长链PFAS,UiO-66-L3实现了快速的动力学 (在5分钟内达到平衡) 和高吸附能力 (403-1872毫克g-1),性能高于同类的高达13.3倍.
- DFT计算证实了增强的静电潜力和链长度依赖的选择性,用于PFAS去除.
结论:
- 表面局部化的寡合体接种策略显著提高了Zr-MOF在长链PFAS捕获方面的性能.
- UiO-66-L3是一种先进的,高性能吸附剂,用于处理持久性有机污染物.
- 定制的表面化学和架构对于设计有效的基于Zr-MOF的环境修复解决方案至关重要.
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