Details

Autor(en) / Beteiligte

• Li, Yang
• Wu, Qianxun
• Guo, Xinghua
• Zhang, Meicheng
• Chen, Bin
• Wei, Guanyi
• Li, Xing
• Li, Xiaofeng
• Li, Shoujian
• Ma, Lijian

Titel

Laminated self-standing covalent organic framework membrane with uniformly distributed subnanopores for ionic and molecular sieving

Ist Teil von

• Nature communications, 2020-01, Vol.11 (1), p.599-599, Article 599

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The preparation of subnanoporous covalent-organic-framework (COF) membranes with high performance for ion/molecule sieving still remains a great challenge. In addition to the difficulties in fabricating large-area COF membranes, the main reason is that the pore size of 2D COFs is much larger than that of most gas molecules and/or ions. It is urgently required to further narrow their pore sizes to meet different separation demands. Herein, we report a simple and scalable way to grow large-area, pliable, free-standing COF membranes via a one-step route at organic-organic interface. The pore sizes of the membranes can be adjusted from >1 nm to sub-nm scale by changing the stacking mode of COF layers from AA to AB stacking. The obtained AB stacking COF membrane composed of highly-ordered nanoflakes is demonstrated to have narrow aperture (∼0.6 nm), uniform pore distribution and shows good potential in organic solvent nanofiltration, water treatment and gas separation.