在石墨烯氧化物膜中通过隔层间隔的离子控制进行离子选
Liang Chen1,2,3, Guosheng Shi2, Jie Shen4
1Shanghai Applied Radiation Institute, Shanghai University, Shanghai 200444, China.
Nature
|October 10, 2017
概括
石墨烯氧化物膜现在可以精确地使用各种阴离子控制层间距. 这一突破使得有效的离子过能够克服水净化和分离技术的先前局限性.
科学领域:
- 材料科学
- 纳米技术
- 物理化学
背景情况:
- 石墨烯氧化物膜提供超薄,高流量,高能效的离子和分子选.
- 目前的限制包括可变的孔径和水溶液中的胀,妨碍精确的离子过.
- 现有的挑战阻碍了石墨烯氧化物膜在先进的分离技术中的应用.
研究的目的:
- 使用子来证明精确控制氧化石膜间隔.
- 根据受控间距来研究离子的选择性排除.
- 了解控制阴离子吸附和间隔的基本相互作用.
主要方法:
- 利用K+,Na+,Ca2+,Li+或Mg2+离子以安格斯特罗姆精度调整石墨烯氧化物膜间隔.
- 使用第一原理计算和紫外线吸收光谱来分析阳离子吸收.
- 研究了具有较大的水合体积的离子体的选择性排除.
主要成果:
- 通过阴离子选择实现了氧化石膜间隔的安格斯特罗姆级控制.
- 基于受控的膜间距,有效选择性地排除特定的子.
- 在氧化物组和芳香环的接口处确定了稳定的阴离子吸附点.
结论:
- 阴离子控制提供了一种精确的方法来调整石墨烯氧化物膜间隔,以便进行高级选.
- 这种方法克服了与可变孔径和膜胀相关的先前限制.
- 开发用于水净化,离子分离和其他应用的高度选择性膜的潜力.
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