Graphene Oxide Membranes with Strong Stability in Aqueous Solutions and Controllable Lamellar Spacing
Graphene Oxide Membranes with Strong Stability in Aqueous Solutions and Controllable Lamellar Spacing
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DOI：
10.1021/acsami.6b00928
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发表时间：
2016-06-22
影响因子：
9.5
通讯作者：
Chu, Liang-Yin
中科院分区：
文献类型：
--
作者：
Xi, Yue-Heng;Hu, Jia-Qi;Chu, Liang-Yin
氧化石墨烯（GO）膜由于其由紧密间隔的GO片形成的良好限定的二维纳米通道和可调的物理化学性质而成为新兴的用于分子或离子分离的高效过滤器。GO膜在水溶液中的稳定性是其应用的先决条件。在这里，我们展示了一种新的和简单的策略，用于制造GO膜，在水溶液中具有很强的稳定性和可控的片层间距，通过简单地掺杂部分还原的氧化石墨烯（prGO）片。通过我们的prGO掺杂策略，由于GO片之间的排斥水合作用减弱和π-π吸引作用增强，GO膜中的层间稳定力增强;因此，所制备的GO膜具有可控的片层间距，在水甚至强酸强碱溶液中具有优异的稳定性，这将扩大GO膜的应用范围，并在其水溶液环境应用中提供更好的性能。
Graphene oxide (GO) membranes become emerging efficient filters for molecular or ionic separation due to their well-defined two-dimensional nanochannels formed by closely spaced GO sheets and tunable physicochemical properties. The stability of GO membranes in aqueous solutions is a prerequisite for their applications. Here we show a novel and easy strategy for fabricating GO membranes with strong stability in aqueous solutions and controllable lamellar spacing by simply doping with partially reduced graphene oxide (prGO) sheets. With our prGO-doping strategy, the interlayer stabilizing force in GO membranes is enhanced due to the weakened repulsive hydration and enhanced pi-pi attraction between GO sheets; as a result, the fabricated GO membranes are featured with controllable lamellar spacing and extraordinary stability in water or even strong acid and base solutions as well as strong mechanical properties, which will expand the application scope of GO membranes and provide ever better performances in their applications with aqueous solution environments.