Highly stable and antifouling graphene oxide membranes prepared by bio-inspired modification for water purification
Highly stable and antifouling graphene oxide membranes prepared by bio-inspired modification for water purification
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仿生改性制备的高稳定防污氧化石墨烯膜用于水净化
DOI：
10.1016/j.cclet.2020.03.033
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发表时间：
2020-03
影响因子：
9.1
通讯作者：
Wanbin Li
中科院分区：
文献类型：
--
作者：
Weiming Zhong;Yuyu Zhang;Ling Zhao;Wanbin Li
氧化石墨烯(GO)膜在水处理分子分离方面显示出巨大的潜力。然而，GO膜的稳定性差是制约其实际应用的主要瓶颈。在这项研究中，生物激发的多多巴胺(PDA)沉积被用来提高GO膜的稳定性。通过简单和温和的浸泡，PDA在GO膜上自聚合。PDA链对膜缺陷的封闭提高了对各种分子的截留率。由于PDA固有的粘附性和交联性极大地加强了衬底与GO层的相互作用和GO纳米片的结合力，所制备的PDA-GO膜在错流过滤中表现出令人印象深刻的长期稳定性，并在不同的进料压力、切向速度下，甚至在外部刮擦后都保持了良好的纳滤性能。此外，由于沉积的PDA层阻挡了GO与污染物的直接接触，使得PDA-GO膜的防污染性能大大提高，回收率约为98%。
Graphene oxide (GO) membranes show great potential in molecular separation for water treatment. However, the inferior stability of GO membranes is a major bottleneck for practical applications. In this study, bio-inspired polydopamine (PDA) deposition is reported for enhancing the stability of GO membranes. Through simple and mild immersion, PDA is self-polymerized on GO membranes. The blocking of PDA chains to membrane defects improves the rejections for various molecules. Because the inherently strong adhesion and crosslinking of PDA greatly strengthen the interactions of substrates to GO layers and the binding force of GO nanosheets, the prepared PDA-GO membranes exhibit impressive long-term stability in cross-flow filtration, and maintain good nanofiltration performance at various feed pressures, tangential velocities, and even after external scratching. Moreover, because the deposited PDA layers obstruct the direct contact between GO and contaminants, the antifouling property of the PDA-GO membranes increases substantially, with recovery ratio about 98%.
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影响因子：
15.1
作者：
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通讯作者：
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作者：
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影响因子：
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作者：
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影响因子：
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作者：
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影响因子：
9.1
作者：
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通讯作者：
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