双连续的性伊米达酸框架ZIF-8@GO膜具有增强的选择性
Aisheng Huang1, Qian Liu, Nanyi Wang
1Institute of New Energy Technology, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences , 1219 Zhongguan Road, 315201 Ningbo, P. R. China.
Journal of the American Chemical Society
|October 8, 2014
概括
通过层次沉积创建了一个新的ZIF-8@GO膜. 这种膜在通过分子选进行气体分离和净化时具有很高的选择性.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 纳米技术纳米技术
背景情况:
- 像ZIF-8这样的金属有机框架 (MOF) 为气体分离提供可调节的多孔性.
- 石墨烯氧化物 (GO) 以其屏障特性和膜技术中的潜力而闻名.
- MOF和2D材料的有效组合对于先进的膜性能至关重要.
研究的目的:
- 开发一种新的双连续ZIF-8@GO膜,用于增强气体分离.
- 为了研究ZIF-8@GO膜的气体传输机制和选择性.
- 为了评估用于净化应用的膜的性能.
主要方法:
- 石墨烯氧化物 (GO) 悬浮在半连续的ZIF-8层上逐层沉积 (LBL).
- 制造一个双连续的ZIF-8@GO膜结构.
- 在高温 (250°C) 和高压 (1bar) 的气体透和分离实验.
主要成果:
- ZIF-8@GO膜有效地与GO封闭ZIF-8晶体之间的空隙,通过ZIF-8微孔 (0.34纳米) 引导气流.
- 实现了高选择性,H2/CO2,H2/N2,H2/CH4和H2/C3H8的混合物分离因子分别达到14.9,90.5,139.1和3816.6.
- 膜的透率大约为1.3 × 10−7 mol·m−2·s−1·Pa−1.1.
结论:
- 开发的ZIF-8@GO膜显示了高效的分离和净化的巨大潜力.
- LBL沉积方法为创建具有定制性质的先进复合膜提供了可行的途径.
- 独特的双连续结构促进了基于ZIF-8的内在微孔性分子选.
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