Atomistic understandings of reduced graphene oxide as an ultrathin-film nanoporous membrane for separations.
Atomistic understandings of reduced graphene oxide as an ultrathin-film nanoporous membrane for separations.
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DOI：
10.1038/ncomms9335
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发表时间：
2015-09-23
影响因子：
16.6
通讯作者：
Grossman JC
中科院分区：
文献类型：
--
作者：
Lin LC;Grossman JC
在还原过程中形成的还原氧化石墨烯（rGO）中的固有缺陷可以充当纳米孔，使得rGO成为用于分离的有前途的超薄膜膜候选物。为了评估rGO在此类应用中的潜力，采用分子动力学技术来了解rGO中的缺陷形成及其在水脱盐和天然气纯化中的分离性能。我们建立了rGO合成参数和缺陷尺寸之间的关系，从而得到一种控制rGO中纳米孔尺寸的潜在方法。此外，我们的研究结果表明，在适当选择的合成条件下获得的rGO膜可以实现有效的分离，并提供显着更高的渗透通量比目前可用的膜。 超薄膜纳米多孔膜有望为水脱盐和天然气净化等应用提供低成本和高性能的分离。在这里，作者采用分子动力学方法来评估还原氧化石墨烯作为这种材料的潜力。
The intrinsic defects in reduced graphene oxide (rGO) formed during reduction processes can act as nanopores, making rGO a promising ultrathin-film membrane candidate for separations. To assess the potential of rGO for such applications, molecular dynamics techniques are employed to understand the defect formation in rGO and their separation performance in water desalination and natural gas purification. We establish the relationship between rGO synthesis parameters and defect sizes, resulting in a potential means to control the size of nanopores in rGO. Furthermore, our results show that rGO membranes obtained under properly chosen synthesis conditions can achieve effective separations and provide significantly higher permeate fluxes than currently available membranes. Ultrathin-film nanoporous membranes promise low-cost and high-performance separation for applications such as water desalination and the purification of natural gas. Here, the authors adopt a molecular dynamics approach to assess the potential of reduced grapheme oxide as such a material.