Development of materials with excellent separation performance remains an ongoing challenge in separation science and technology. Herein, a novel strategy was proposed to gradually enhance gas separation performance in micro/nano‐materials, by constructing a shell‐interlayer‐core structure using ionic liquid (triethylenetetramine lactate, [TETA]L) and zeolitic imidazolate framework (ZIF‐8). Such structure includes outer [TETA]L shell, interlayer of ZIF‐8, and inner [TETA]L core, endowing the composite with more evident molecular sieving separation for CO₂ mixtures than the reported materials. A high CO₂ adsorption amount (1.53 mmol/g at 298 K and 1.0 bar) is maintained, while the uptakes for CH₄ and N₂ are very low. Corresponding ideal adsorbed solution theory selectivities are 260–1,990 and 1,688–5,572 for CO₂/CH₄ and CO₂/N₂ mixtures at the range of tested pressures. In addition, the separation performance can be controlled by varying the shell‐interlayer‐core structure with IL inside, outside or on both sides of ZIF‐8 and the thickness of outer shell.

中文翻译：

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具有壳-夹层-芯结构的IL-ZIF-IL复合材料中CO2吸附和分离的逐步增强

具有优异分离性能的材料的开发仍然是分离科学和技术中的持续挑战。本文提出了一种新的策略，通过使用离子液体（乳酸三亚乙基四胺酯，[TETA] L）和咪唑型沸石骨架（ZIF-8）构建壳-夹层-芯结构，逐步提高微/纳米材料中的气体分离性能。 。这种结构包括TETAL外壳，ZIF-8夹层和TETAL内芯，使复合材料比所报道的材料对CO ₂混合物具有更明显的分子筛分离效果。保持高的CO ₂吸附量（在298 K和1.0 bar下为1.53 mmol / g），同时吸收CH ₄和N ₂非常低 在测试压力范围内，对于CO ₂ / CH ₄和CO ₂ / N ₂混合物，相应的理想吸附溶液理论选择性为260-1,990和1,688-5,572 。此外，可以通过改变ZIF-8内部，外部或两侧的IL和外壳厚度来改变壳层-夹层-芯结构，从而控制分离性能。