石墨烯
膜
堆积
材料科学
纳米技术
氧化物
纳米结构
选择性
化学物理
化学
生物化学
催化作用
有机化学
冶金
作者
Jie Shen,Gongping Liu,Kang Huang,Zhenyu Chu,Wanqin Jin,Nanping Xu
出处
期刊:ACS Nano
[American Chemical Society]
日期:2016-02-15
卷期号:10 (3): 3398-3409
被引量:318
标识
DOI:10.1021/acsnano.5b07304
摘要
Two-dimensional (2D) materials with atomic thickness and extraordinary physicochemical properties exhibit unique mass transport behaviors, enabling them as emerging nanobuilding blocks for separation membranes. Engineering 2D materials into membrane with subnanometer apertures for precise molecular sieving remains a great challenge. Here, we report rational-designing external forces to precisely manipulate nanoarchitecture of graphene oxide (GO)-assembled 2D channels with interlayer height of ∼0.4 nm for fast transporting and selective sieving gases. The external forces are synergistic to direct the GO nanosheets stacking so as to realize delicate size-tailoring of in-plane slit-like pores and plane-to-plane interlayer-galleries. The 2D channels endow GO membrane with excellent molecular-sieving characteristics that offer 2–3 orders of magnitude higher H2 permeability and 3-fold enhancement in H2/CO2 selectivity compared with commercial membranes. Formation mechanism of 2D channels is proposed on the basis of the driving forces, nanostructures, and transport behaviors.
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