Controlling interlayer spacings of graphene oxide membranes with cationic for precise sieving of mono-/multi-valent ions
Controlling interlayer spacings of graphene oxide membranes with cationic for precise sieving of mono-/multi-valent ions
复制标题
用阳离子控制氧化石墨烯膜的层间距以精确筛分单价/多价离子
DOI：
10.1016/j.seppur.2020.116738
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发表时间：
2020-06-15
影响因子：
8.6
通讯作者：
Fang, Haiping
中科院分区：
文献类型：
--
作者：
Liang, Shanshan;Wang, Shuai;Fang, Haiping
离子筛分在水净化、生物医学工程、资源利用和环境保护等多种应用中具有重要意义。尽管前人的努力，单/多价离子的分离效率仍远不能令人满意。在这里，我们使用高浓度的KCl溶液来控制氧化石墨烯（GO）膜的层间间距。然后，这些kcl控制的氧化石墨烯膜可以精确筛选单价/多价，特别是Na+/Mg2+的分离。氧化石墨烯膜的优异性能可归因于kcl控制氧化石墨烯膜的层间间距较窄。
Ion sieving is of great importance in a variety of applications, including water purification, bio-medical engineering, resource utilization and environment protection. Despite previous efforts, the separation efficiency for mono-/multi valent ions is still far from satisfactory. Here, we use high concentration of KCl solution to control the interlayer spacings of graphene oxide (GO) membranes. Then, these KCl-controlled GO membranes can precisely sieve mono-/multi-valentions, especially for Na+/Mg2+ separation. The excellent performance of the membranes can be attributed to the narrower interlayer spacings of KCl-controlled GO membranes.