金属有机框架的狭窄协调诱导的杂交成精确的分子选膜
Guozhen Liu1, Binyu Mo1, Yanan Guo1
1State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing, 211816, China.
Angewandte Chemie (International ed. in English)
|April 12, 2024
概括
一个新的局限协调策略制造出无缺陷的金属有机框架 (MOF) 膜. 这些先进的MOF膜提供了卓越的气体分离和水淡化性能,克服了以前的制造挑战.
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:
- 金属有机框架 (MOF) 膜由于可调节的孔隙,对分子分离有希望.
- 制造无缺陷,高度连接的MOF膜,具有水稳定性仍然是一个挑战.
- 无法控制的核和生长速度阻碍了MOF膜的发展.
研究的目的:
- 开发一种新的策略,用于制造无格子缺陷的Zr-MOF膜.
- 为了实现气体和水应用的精确分子分离.
- 了解MOF膜中的分子运输机制.
主要方法:
- 采用了有限协调诱导的杂交生长策略.
- 通过调节局限协调空间和环境来控制MOF前体的扩散和反应速度.
- 密度函数理论 (DFT) 的计算被用来研究分子运输.
主要成果:
- 制造的无网格缺陷的Zr-MOF膜,具有安格斯特罗姆大小的孔径.
- 在气体分离中实现了高H2透度 (~1200GPU) 和H2/CO2选择性 (~67).
- 在海水淡化过程中,证明了高水透度 (~8 L·m−2·h−1·bar−1) 和MgCl2排斥率 (~95%).
- 结果显著超过一到两个数量级的最先进的膜.
结论:
- 局限协调策略使得高性能,无缺陷的MOF膜的制造成为可能.
- 开发的Zr-MOF膜显示了精确分子选的绝佳潜力.
- 该研究提供了对MOF膜制造和运输机制的基本见解.
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