Solid-Vapor Interface Engineered Covalent Organic Framework Membranes for Molecular Separation,Journal of the American Chemical Society

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Solid-Vapor Interface Engineered Covalent Organic Framework Membranes for Molecular Separation
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2020-07-10 , DOI: 10.1021/jacs.0c04589
Niaz Ali Khan _{1,

2,

3} , Runnan Zhang _{1,

2} , Hong Wu _{1,

2,

4} , Jianliang Shen _{1,

2} , Jinqiu Yuan _{1,

2} , Chunyang Fan _{1,

2} , Li Cao _{1,

2} , Mark A Olson _{5,

6} , Zhongyi Jiang _{1,

2}

Affiliation

Covalent organic frameworks (COFs) with intrinsic, tunable, and uniform pores are potent building blocks for separation membranes, yet poor processing ability and long processing time remain grand challenges. Herein, we re-port an engineered solid-vapor interface to fabricate a highly crystalline two-dimensional COF membrane with a thickness of 120 nm in 9 hours, which is 8 times faster than the reported literature. Due to the ultra-thin nature and ordered pores, the membrane exhibited an ultra-high permeance (water ~ 411 L m-2 h-1 bar-1 and acetonitrile ~ 583 L m-2 h-1 bar-1) and excellent rejection of dye molecules larger than 1.4 nm (> 98%). The membrane exhibited long-term operation which confirmed its outstanding stability. Our solid-vapor interfacial polymerization method may evolve into a generic platform to fabricate COFs and other organic frameworks membranes.

中文翻译：

用于分子分离的固气界面工程共价有机骨架膜

具有内在、可调和均匀孔的共价有机框架 (COF) 是分离膜的有效构建块，但处理能力差和处理时间长仍然是巨大的挑战。在此，我们报告了一种工程固气界面，可在 9 小时内制造厚度为 120 nm 的高度结晶的二维 COF 膜，比报道的文献快 8 倍。由于超薄的性质和有序的孔隙，该膜表现出超高的渗透性（水~411 L m-2 h-1 bar-1 和乙腈~ 583 L m-2 h-1 bar-1）和优异的拒绝大于 1.4 nm (> 98%) 的染料分子。该膜表现出长期运行，证实了其出色的稳定性。

更新日期：2020-07-10

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