Fullerene-regulated graphene oxide nanosheet membranes with well-defined laminar nanochannels for precise molecule sieving
Fullerene-regulated graphene oxide nanosheet membranes with well-defined laminar nanochannels for precise molecule sieving
复制标题
富勒烯调节的氧化石墨烯纳米片膜具有明确的层状纳米通道，可用于精确的分子筛分
DOI：
10.1039/c8ta08261h
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发表时间：
2018
影响因子：
11.9
通讯作者：
Qinglin Liu
中科院分区：
文献类型：
--
作者：
Xingyan Tang;Yan Qu;Shun-Liu Deng;Yuan-Zhi Tan;Qiugen Zhang;Qinglin Liu
氧化石墨烯纳米片（GONs）具有原子厚度、良好的分散性、坚固性和高产量等特点，在离子和分子筛选膜的制备中引起了极大的关注。然而，构建明确的二维纳米通道用于小分子的精确分离仍然是一个挑战。在此，我们展示了一种通用的策略，通过引入功能化富勒烯（C60）来构建尺寸为1-2 nm的GON膜的明确的层状纳米通道，用于高效的分子分离。功能化的C60不仅是精确构建层状纳米通道的明确和刚性的纳米级支点，而且是产生具有优异结构稳定性的膜的交联剂。所得膜保持良好的亲水性，并具有短的层状纳米通道，精确的高度从0.91到1.56 nm。具有完美的1.56 nm高的通道的膜具有最高的水渗透性，这是四个数量级以上的减少GON膜，并显示出优异的有机染料的尺寸选择性。此外，制造的膜显示出强大的机械强度和良好的长期稳定性的纳滤。
Graphene oxide nanosheets (GONs), featuring atomic thickness, good dispersibility, robustness and high production yield, have attracted great attention in the fabrication of ion and molecule sieving membranes. However, construction of well-defined two-dimensional nanochannels for precise separation of small molecules is still a challenge. Herein, we demonstrate a versatile strategy to construct well-defined laminar nanochannels of GON membranes sized at 1–2 nm for high-efficient molecule separation by introducing functionalized fullerenes (C60). Functionalized C60 is not only a well-defined and rigid nanosized fulcrum to precisely construct the laminar nanochannels, but also a crosslinker to produce membranes with excellent structural stability. The resultant membranes retain good hydrophilicity and have short laminar nanochannels with a precise height from 0.91 to 1.56 nm. The membrane with perfect 1.56 nm-high channels has the highest water permeability, which is four orders of magnitude higher than that of the reduced GON membrane, and shows excellent size selectivity for organic dyes. Furthermore, the fabricated membranes display robust mechanical strength and good long-term stability for nanofiltration.