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金属有机框架的金属调节灵活性工程用于C₂H₂/CO₂分离

Shanshan Mao¹, Meiling Li¹, Jiafeng Miao¹

¹Hoffmann Institute of Advanced Materials, Shenzhen Polytechnic University, 7098 Liuxian Blvd., Nanshan, Shenzhen 518055, Guangdong, PR China.

Inorganic chemistry

|November 7, 2025

概括

研究人员开发了灵活的金属有机框架 (MOF) 来从二氧化碳 (CO2) 中分离乙 (C2H2). Co-bz MOF 显示出卓越的选择性,为气体分离挑战提供了有希望的解决方案.

科学领域:

材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.
吸附科学吸附科学

背景情况:

将乙 (C2H2) 与二氧化碳 (CO2) 分离是很困难的,因为它们的分子大小和特性相似.
设计具有高效C2H2/CO2分离的特定结构特征的吸附剂是一个重大挑战.

研究的目的:

为了合成和研究一系列的同结构柔性金属有机框架 (MOFs) 选择性C2H2/CO2吸附.
了解金属节点如何影响气体分离MOF的结构灵活性和孔隙结构.

主要方法:

合成同结构灵活的MOFs (M-bz,其中M = Co,Ni,Zn) 使用5-(3,5-dimethyl-1H-pyrazol-4-yl) 异硫酸.
描述MOF的结构性质和孔隙结构.
使用气体吸附测量对C2H2/CO2吸附选择性和吸收的评估.
通过多组件突破性实验验验证分离性能.

主要成果:

合成的MOFs (Co-bz,Ni-bz,Zn-bz) 显示出C2H2对CO2的选择性吸附.
Co-bz表现出最高的C2H2/CO2选择性 (5.36) 和最高的吸收比率 (2.71).
突破性实验证实了MOFs的有效分离能力.

结论:

MOFs,特别是Co-bz的结构灵活性和孔表面化学性质对于选择性C2H2吸附至关重要.
在Co-bz中,最佳的灵活性和相互作用 (键,C-H···π) 增强了C2H2的亲和力,使得有效的分离成为可能.
这些灵活的MOF为挑战C2H2/CO2分离提供了可行的策略.

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