Implications of Permeation through Intrinsic Defects in Graphene on the Design of Defect-Tolerant Membranes for Gas Separation

被引：189

作者：

Boutilier, Michael S. H. ^{[1
]}

Sun, Chengzhen ^{[1
,2
]}

O'Hern, Sean C. ^{[1
]}

Au, Harold ^{[1
]}

Hadjiconstantinou, Nicolas G. ^{[1
]}

Karnik, Rohit ^{[1
]}

机构：

[1] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

[2] Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China

来源：

ACS NANO | 2014年 / 8卷 / 01期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

graphene membranes; gas separation; multilayer graphene; nanofiltration; nanofluidics; POROUS GRAPHENE; OXIDE MEMBRANES; SINGLE-LAYER; TRANSPORT;

D O I：

10.1021/nn405537u

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Gas transport through intrinsic defects and tears is a critical yet poorly understood phenomenon in graphene membranes for gas separation. We report that independent stacking of graphene layers on a porous support exponentially decreases flow through defects. On the basis of experimental results, we develop a gas transport model that elucidates the separate contributions of tears and intrinsic defects on gas leakage through these membranes. The model shows that the pore size of the porous support and its permeance critically affect the separation behavior, and reveals the parameter space where gas separation can be achieved regardless of the presence of nonselective defects, even for single-layer membranes. The results provide a framework for understanding gas transport in graphene membranes and guide the design of practical, selectively permeable graphene membranes for gas separation.

引用

页码：841 / 849

页数：9

共 20 条

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