Ultrathin, Molecular-Sieving Graphene Oxide Membranes for Selective Hydrogen Separation
Ultrathin, Molecular-Sieving Graphene Oxide Membranes for Selective Hydrogen Separation
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DOI：
10.1126/science.1236686
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发表时间：
2013-10-04
期刊：
影响因子：
56.9
通讯作者：
Yu, Miao
中科院分区：
文献类型：
--
作者：
Li, Hang;Song, Zhuonan;Yu, Miao
超薄分子筛膜在实现高通量、高选择性、低能耗的混合物分离方面具有很大潜力。然而，当前的微孔膜[孔径和1纳米(Nm)]通常相对较厚。利用现有的膜材料和技术，很难在不引入额外缺陷的情况下制备厚度小于20 nm的微孔膜。在这里，我们报道了一种简单的过滤工艺，制备了厚度接近1.8 nm的超薄氧化石墨烯(GO)膜。这些膜对H_2/CO_2和H_2/N_2混合气体的分离选择性分别高达3400和900。
Ultrathin, molecular-sieving membranes have great potential to realize high-flux, high-selectivity mixture separation at low energy cost. Current microporous membranes [pore size < 1 nanometer (nm)], however, are usually relatively thick. With the use of current membrane materials and techniques, it is difficult to prepare microporous membranes thinner than 20 nm without introducing extra defects. Here, we report ultrathin graphene oxide (GO) membranes, with thickness approaching 1.8 nm, prepared by a facile filtration process. These membranes showed mixture separation selectivities as high as 3400 and 900 for H-2/CO2 and H-2/N-2 mixtures, respectively, through selective structural defects on GO.