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为MOF-5定制的疏水孔状外

Jianhui Li¹, Puxu Liu¹, Yang Chen¹

¹College of Chemical Engineering and Technology, Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Taiyuan University of Technology, Taiyuan, 030024 Shanxi, P. R. China.

Journal of the American Chemical Society

|August 14, 2023

概括

研究人员为脆弱的金属有机框架 (MOF) 开发了一种新的疏水外,提高了它们的防潮能力. 这一突破使稳定的MOF-5复合材料能够在潮湿的环境中有效分离CO2/N2.

科学领域:

材料科学
纳米技术
化学工程

背景情况:

金属有机框架 (MOF) 具有很好的孔隙性,但受到湿度敏感性的影响,限制了它们的实际使用.
核心外复合结构是防潮的潜在策略,但对于脆弱的MOF来说具有挑战性.

研究的目的:

为脆弱的MOF-5开发一个强大的疏水孔外.
研究由此产生的核心外复合材料的组装机制和耐湿性.
在潮湿条件下证明材料在气体分离中的有效性.

主要方法:

在MOF-5上使用"插入插座定"策略制造疏水性多孔NTU-COF外.
通过低温聚焦离子束 (cryo-FIB) 和超低剂量传输电子显微镜进行原子分辨率成像.
在潮湿条件下对CO2/N2分离的性能评估.

主要成果:

成功建造了一种具有良好的MOF-5孔结构的MOF-5@NTU-COF核心外复合材料.
在潮湿条件下通过复合材料证明完全的CO2/N2分离.
对同质接口和组装机制的原子层次洞察力.

结论:

在不稳定的MOF上创建疏水性多孔的简单策略已经确定.
MOF-5@NTU-COF复合材料可以克服湿度的不稳定性,从而实现实际应用.
这种方法为提高多孔材料的耐用性提供了一种通用解决方案.

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