The rich micropore development in porous adsorbents has been widely recognized as an indispensable prerequisite for effectively separating SF₆/N₂ and NF₃/N₂, while the fast adsorption kinetics is also essential to improve the overall adsorption-separation efficiency. In this work, the carbon nanosheet adsorbents with easily accessible micropores were synthesized via one-step self-activation method using potassium citrate as a precursor, and were systematically evaluated for the adsorptive separation of SF₆/N₂ and NF₃/N₂ mixtures. By tuning the carbonization temperatures in the range of 600–850 °C, the optimal PC-750 with dense and abundant micropores at 0.5–0.8 nm is obtained. Resultantly, PC-750 exhibits a high SF₆ uptake of 4.09 mmol·g⁻¹ and record SF₆/N₂ selectivity of 436.4 among the reported carbon adsorbents at 298 K and 100 kPa. Significantly, the NF₃/N₂ selectivity reaches up to 61.4 for PC-750 under the same conditions, surpassing all the reported adsorbents. Additionally, the correlation between volume of different pores sizes and gas uptake well explains the adsorption performance of SF₆ and NF₃. Furthermore, the adsorption kinetics and dynamic breakthrough experiments verify the rapid adsorption rate, excellent separation performance of SF₆/N₂ and NF₃/N₂, as well as recyclability of PC-750 adsorbent. These findings are beneficial for the rational design of more highly-efficient carbon adsorbents for separating SF₆/N₂ and NF₃/N₂.

多孔吸附剂丰富的微孔发育被广泛认为是有效分离SF ₆ /N ₂和NF ₃ /N ₂不可或缺的先决条件，而快速的吸附动力学对于提高整体吸附分离效率也至关重要。本工作以柠檬酸钾为前驱体，通过一步自活化法合成了具有易接近微孔的碳纳米片吸附剂，并系统评价了其对SF ₆ /N ₂和NF ₃ /N ₂混合物的吸附分离性能。 。通过将碳化温度调节在600-850℃范围内，获得了具有致密且丰富的0.5-0.8 nm微孔的最佳PC-750。结果，PC-750在298 K和100 kPa下表现出4.09 mmol·g ^-1的高SF ₆吸收量，并在报道的碳吸附剂中记录了436.4的SF ₆ /N _{2选择性。}值得注意的是，在相同条件下，PC-750的NF ₃ /N ₂选择性高达61.4，超过了所有报道的吸附剂。_{另外，不同孔径的体积与气体吸收量之间的相关性很好地解释了SF 6}和NF ₃的吸附性能。此外，吸附动力学和动态突破实验验证了SF ₆ /N ₂和NF ₃ /N ₂的快速吸附速率、优异的分离性能以及PC-750吸附剂的可回收性。这些发现有利于合理设计更高效的分离SF ₆ /N ₂和NF ₃ /N ₂的碳吸附剂。