Remarkably Enhanced Gas Separation by Partial Self-Conversion of a Laminated Membrane to Metal-Organic Frameworks
Remarkably Enhanced Gas Separation by Partial Self-Conversion of a Laminated Membrane to Metal-Organic Frameworks
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DOI：
10.1002/anie.201411550
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发表时间：
2015-03-02
影响因子：
16.6
通讯作者：
Caro, Juergen
中科院分区：
文献类型：
--
作者：
Liu, Yi;Pan, Jia Hong;Caro, Juergen
基于2D夹层廊道的分离方法目前得到广泛关注。然而，这种通道作为高性能气体分离膜的潜力仍然很少被探索。此外，众所周知，在基于膜的气体分离中，气体渗透率和分离因子通常是负相关的。因此，打破这种权衡变得非常可取。在这里，2D层压膜的气体分离性能通过其部分自转化为金属-有机骨架而得到改善。通过对ZnAl-NO3层状双氢氧化物（LDH）膜的部分转化，一步成功制备了ZIF-8-ZnAl-NO3复合膜，最终显著提高了H2/CH 4分离因子和H2渗透率。
Separation methods based on 2D interlayer galleries are currently gaining widespread attention. The potential of such galleries as high-performance gas-separation membranes is however still rarely explored. Besides, it is well recognized that gas permeance and separation factor are often inversely correlated in membrane-based gas separation. Therefore, breaking this trade-off becomes highly desirable. Here, the gas-separation performance of a 2D laminated membrane was improved by its partial self-conversion to metal-organic frameworks. A ZIF-8-ZnAl-NO3 layered double hydroxide (LDH) composite membrane was thus successfully prepared in one step by partial conversion of the ZnAl-NO3 LDH membrane, ultimately leading to a remarkably enhanced H-2/CH4 separation factor and H-2 permeance.