Graphene Oxide: A Novel 2-Dimensional Material in Membrane Separation for Water Purification
Graphene Oxide: A Novel 2-Dimensional Material in Membrane Separation for Water Purification
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DOI：
10.1002/admi.201600918
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发表时间：
2017-03-09
影响因子：
5.4
通讯作者：
Yu, Miao
中科院分区：
文献类型：
--
作者：
Fathizadeh, Mahdi;Xu, Weiwei L.;Yu, Miao
氧化石墨烯(GO)作为一种新兴的亚纳米厚度的二维(2D)材料，因其独特的物理化学机械性能，无论是作为纯膜/骨架膜材料，还是作为水净化基质膜的添加剂和功能涂层，都得到了广泛的研究。将这种新型的二维材料有效地操纵或结合到膜结构中可以显著改善膜的性能，包括增加透水率、减轻污染、改善抗菌性能等，最终将导致更低的能耗、更长的使用寿命和更低的维护成本。作为纯/骨架膜材料，GO片层通常通过溶液包覆工艺沉积在合适的多孔载体上，GO片层之间的纳米通道以及GO片层内的结构缺陷可以作为传输通道。GO作为一种有效的添加剂和表面功能涂层，在提高水的渗透性、表面亲水性和耐化学性方面也显示出巨大的潜力。本文综述了GO膜用于净水的最新研究进展，并对其潜在的挑战进行了讨论。此外，还提出了在不同的膜分离过程中进一步开发GO膜或GO复合膜用于净水的可能的研究方向。
As a newly emerging 2-dimensional (2-D) material with sub-nanometer thickness, graphene oxide (GO) has been widely studied either as a pure/skeleton membrane material or as an additive in and a functional coating on matrix membranes for water purification because of its unique physico-chemico-mechanical properties. Manipulating or incorporating this novel 2-D material effectively into a membrane structure has been shown to significantly improve membrane performance, including increased water permeability, alleviated fouling, improved antibacterial properties, etc., which will eventually lead to lower energy consumption, longer lifetime, and lower maintenance cost. As the pure/skeleton membrane material, GO flakes typically are deposited as a lamellar structure by solution-based coating processes on appropriate porous supports, and nano-channels between GO sheets and sometimes structural defects within GO could be utilized as transport passage. As an effective additive and surface functional coating, GO also shows great potential to improve water permeation, surface hydrophilicity, and chemical resistance. In this paper, the latest studies on the use of GO in membrane application for water purification are reviewed, and potential challenges are discussed. Moreover, possible future research directions to further develop GO or GO-incorporated membranes for water purification are suggested in different membrane separation processes.