渗透
膜
纳米片
层状结构
材料科学
石墨氮化碳
堆积
化学工程
气体分离
氮化物
碳纤维
纳米孔
纳米技术
图层(电子)
化学
有机化学
复合材料
复合数
催化作用
渗透
生物化学
光催化
工程类
作者
Yisa Zhou,Ying Wu,Haoyu Wu,Jian Xue,Li Ding,Rui Wang,Haihui Wang
标识
DOI:10.1038/s41467-022-33654-6
摘要
Two-dimensional graphitic carbon nitride (g-C3N4) nanosheets are ideal candidates for membranes because of their intrinsic in-plane nanopores. However, non-selective defects formed by traditional top-down preparation and the unfavorable re-stacking hinder the application of these nanosheets in gas separation. Herein, we report lamellar g-C3N4 nanosheets as gas separation membranes with a disordered layer-stacking structure based on high quality g-C3N4 nanosheets through bottom-up synthesis. Thanks to fast and highly selective transport through the high-density sieving channels and the interlayer paths, the membranes, superior to state-of-the-art ones, exhibit high H2 permeance of 1.3 × 10-6 mol m-2 s-1 Pa-1 with excellent selectivity for multiple gas mixtures. Notably, these membranes show excellent stability under harsh practice-relevant environments, such as temperature swings, wet atmosphere and long-term operation of more than 200 days. Therefore, such lamellar membranes with high quality g-C3N4 nanosheets hold great promise for gas separation applications.
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