Yang Mingshan, Wan Zhuoyan, Guo Pengtao, Chang Miao, Li Gan, Li Huifang, Liu Dahuan
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.
Sinopec Shanghai Engineering Company, Limited, Shanghai 200120, China.
ACS Appl Mater Interfaces. 2025 Jan 8;17(1):1077-1084. doi: 10.1021/acsami.4c16644. Epub 2024 Dec 16.
It is essential for the industry to create an adsorbent that combines a high capacity with selectivity to achieve the effective separation of SF from gas mixtures. In this study, we prepared a cost-effective nickel-based metal-organic framework (MOF), Ni(BTC)(BPY), which features hydrogen-rich ultramicroporous channels specifically designed for separating SF/N gas mixtures. The findings from the adsorption experiments demonstrated that Ni(BTC)(BPY) achieved a remarkable SF adsorption capacity of 5.08 mmol g and an ideal adsorbed solution theory SF/N selectivity of 382. This effectively resolves the trade-off encountered in the development of adsorbents between capacity and selectivity. Theoretical calculations indicated the optimal adsorption sites for SF within the pore channels. The strong interactions between the F atoms in SF and the numerous H atoms in the channels account for the superior SF adsorption performance of this material. Breakthrough experiments provided additional evidence that the MOF can completely separate SF/N mixtures, positioning it as an excellent candidate for recovering SF from these gas mixtures.
对于该行业而言，制造一种兼具高容量和选择性的吸附剂以实现从气体混合物中有效分离六氟化硫（SF）至关重要。在本研究中，我们制备了一种具有成本效益的镍基金属有机框架（MOF），即Ni(BTC)(BPY)，其具有专门为分离SF/N气体混合物而设计的富含氢的超微孔通道。吸附实验结果表明，Ni(BTC)(BPY)实现了5.08 mmol/g的显著SF吸附容量以及382的理想吸附溶液理论SF/N选择性。这有效地解决了吸附剂开发中在容量和选择性之间遇到的权衡问题。理论计算表明了孔道内SF的最佳吸附位点。SF中的F原子与通道中众多H原子之间的强相互作用解释了该材料优异的SF吸附性能。突破实验提供了额外证据，证明该MOF能够完全分离SF/N混合物，使其成为从这些气体混合物中回收SF的优秀候选材料。
