Ion sieving in graphene oxide membranes via cationic control of interlayer spacing

doi:10.1038/nature24044

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Ion sieving in graphene oxide membranes via cationic control of interlayer spacing
	Chen, L; Shi, GS; Shen, J; Peng, BQ; Zhang, BW; Wang, YZ; Bian, FG; Wang, JJ; Li, DY; Qian, Z
刊名	NATURE
	2017
卷号	550 期号:7676 页码:-
关键词	Carbon Nanotubes Layered Graphene Porous Graphene Transport Separation Mechanism Ultrathin Future
ISSN号	0028-0836
DOI	10.1038/nature24044
文献子类	期刊论文
英文摘要	Graphene oxide membranes-partially oxidized, stacked sheets of graphene(1)-can provide ultrathin, high-flux and energy-efficient membranes for precise ionic and molecular sieving in aqueous solution(2-6). These materials have shown potential in a variety of applications, including water desalination and purification(7-9), gas and ion separation(10-13), biosensors(14), proton conductors(15), lithium-based batteries(16) and super-capacitors(17). Unlike the pores of carbon nanotube membranes, which have fixed sizes(18-20), the pores of graphene oxide membranes-that is, the interlayer spacing between graphene oxide sheets (a sheet is a single flake inside the membrane)-are of variable size. Furthermore, it is difficult to reduce the interlayer spacing sufficiently to exclude small ions and to maintain this spacing against the tendency of graphene oxide membranes to swell when immersed in aqueous solution(21-25). These challenges hinder the potential ion filtration applications of graphene oxide membranes. Here we demonstrate cationic control of the interlayer spacing of graphene oxide membranes with angstrom precision using K+, Na+, Ca2+, Li+ or Mg2+ ions. Moreover, membrane spacings controlled by one type of cation can efficiently and selectively exclude other cations that have larger hydrated volumes. First-principles calculations and ultraviolet absorption spectroscopy reveal that the location of the most stable cation adsorption is where oxide groups and aromatic rings coexist. Previous density functional theory computations show that other cations (Fe2+, Co2+, Cu2+, Cd2+, Cr2+ and Pb2+) should have a much stronger cation-pi interaction with the graphene sheet than Na+ has(26), suggesting that other ions could be used to produce a wider range of interlayer spacings.
WOS关键词	CARBON NANOTUBES ; LAYERED GRAPHENE ; POROUS GRAPHENE ; TRANSPORT ; SEPARATION ; MECHANISM ; ULTRATHIN ; FUTURE
语种	英语
WOS记录号	WOS:000413247900057
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/28712]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 GB/T 7714	Chen, L,Shi, GS,Shen, J,et al. Ion sieving in graphene oxide membranes via cationic control of interlayer spacing[J]. NATURE,2017,550(7676):-.
APA	Chen, L.,Shi, GS.,Shen, J.,Peng, BQ.,Zhang, BW.,...&Fang, HP.(2017).Ion sieving in graphene oxide membranes via cationic control of interlayer spacing.NATURE,550(7676),-.
MLA	Chen, L,et al."Ion sieving in graphene oxide membranes via cationic control of interlayer spacing".NATURE 550.7676(2017):-.