Tong Sihan, Yao Lu, Wang Qilin, Zhu Jiangli, Wang Zefeng, Yan Jun
International Scientific and Technological Cooperation Base of Industrial Solid Waste Cyclic Utilization and Advanced Materials, School of Materials Science and Engineering, North Minzu University, Yinchuan 750021, China.
College of Ecology, Lishui University, Lishui 323000, China.
ACS Macro Lett. 2024 Nov 19;13(11):1469-1475. doi: 10.1021/acsmacrolett.4c00559. Epub 2024 Oct 21.
Sulfur hexafluoride (SF) is widely used in the power industry and significantly contributes to the greenhouse effect, necessitating the development of efficient materials for SF capture, particularly fluorine-containing materials. However, existing fluorine-containing materials often require complex monomers and high synthesis temperatures. Herein, we report the synthesis of a fluorine-functionalized carbazole-based nanoporous organic polymer (CNOP-7) at room temperature, using commercially available 4,4'-bis(9-carbazole-9-yl)-1,1'-biphenyl and 1,1,1-trifluoroacetone. CNOP-7 contains 14.7% fluorine atoms and exhibits a high specific surface area of 1270 m·g, demonstrating excellent SF adsorption and separation performance. The SF/N selectivity of CNOP-7 reaches 107 at 273 K and 73 at 298 K. Furthermore, dynamic breakthrough experiments confirm that CNOP-7 can efficiently and repeatedly separate SF from SF/N mixtures. Molecular simulations reveal the mechanism behind its efficient separation. This work offers fresh perspectives on the development and fabrication of adsorbents for efficient SF sequestration.
六氟化硫（SF）在电力行业中广泛使用，对温室效应有显著贡献，因此需要开发用于捕获SF的高效材料，特别是含氟材料。然而，现有的含氟材料通常需要复杂的单体和较高的合成温度。在此，我们报道了一种在室温下合成的基于咔唑的氟官能化纳米多孔有机聚合物（CNOP - 7），使用的原料是市售的4,4'-双（9 - 咔唑 - 9 - 基）- 1,1'-联苯和1,1,1 - 三氟丙酮。CNOP - 7含有14.7%的氟原子，具有1270 m²·g的高比表面积，表现出优异的SF吸附和分离性能。CNOP - 7在273 K时的SF/N选择性达到107，在298 K时达到73。此外，动态突破实验证实CNOP - 7可以有效地从SF/N混合物中反复分离出SF。分子模拟揭示了其高效分离的背后机制。这项工作为开发和制造用于高效封存SF的吸附剂提供了新的视角。
