化学学报 ›› 2026, Vol. 84 ›› Issue (1): 129-134.DOI: 10.6023/A25060242 上一篇    下一篇

研究论文

垂直排列金属有机框架纳米片膜实现高效H2传输

叶舣a,, 黄正义b,, 赵兴雷a, 赵娅俐b, 刘龙杰a, 吴武凤b,*(), 魏嫣莹b,*()   

  1. a 中国石油集团安全环保技术研究院有限公司 石油石化污染物控制与处理国家重点实验室 北京 102206
    b 华南理工大学 化学与化工学院 先进造纸与纸基材料全国重点实验室 广东省绿色化工产品技术重点实验室 广东 广州 510640
  • 投稿日期:2025-06-30 发布日期:2025-08-03
  • 基金资助:
    国家自然科学基金(U23A20115); 广东省自然科学基金(2024A1515012724); 广州市科技计划项目(2024A04J6251); 先进造纸与纸基材料全国重点实验室(2024ZD03); 石油石化污染物控制与处理国家重点实验室开放课题(PPC2023001); 中国石油集团科研项目(RISE2023KY13)

Vertically Aligned Metal-organic Framework Nanosheet Membranes for Efficient H2 Transport

Yi Yea, Zhengyi Huangb, Xinglei Zhaoa, Yali Zhaob, Longjie Liua, Wufeng Wub,*(), Yanying Weib,*()   

  1. a State Key Laboratory of Petroleum Pollution Control, CNPC Research Institute of Safety and Environmental Technology, Beijing 102206, China
    b State Key Laboratory of Pulp and Paper Engineering, School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, China
  • Received:2025-06-30 Published:2025-08-03
  • Contact: * E-mail: wuwufeng@scut.edu.cn;ceyywei@scut.edu.cn
  • About author:
    These authors contributed equally to this work.
  • Supported by:
    National Natural Science Foundation of China(U23A20115); Natural Science Foundation of Guangdong Province(2024A1515012724); Guangzhou Municipal Science and Technology Project(2024A04J6251); State Key Laboratory of Pulp and Paper Engineering(2024ZD03); Open Project Program of State Key Laboratory of Petroleum Pollution Control(PPC2023001); Scientific Research Project of China National Petroleum Corporation(RISE2023KY13)

当前全球90%以上的氢气生产依赖于天然气重整工艺, 因此实现高效的碳脱除及氢气提纯对推动高纯度氢能的大规模应用具有重要意义. 具有有序多孔结构的金属有机框架(MOFs)纳米片膜在氢气纯化领域展现出巨大潜力. 然而, MOF纳米片膜面临传统水平堆叠方式所带来的气体传输路径迂回问题, 严重制约了其传质效率. 为此, 本研究采用一种快速电流驱动策略, 在短短10 min内实现了垂直MOF纳米片膜的原位构筑. 该垂直排列结构显著改善了气体分子的扩散路径, 所制备的垂直MOF纳米片膜表现出了极高的H2渗透性能, 其渗透率达到1.5×10-6 mol•m-2•s-1•Pa-1, 相较于传统的水平堆叠结构膜提升了5倍. 同时, 在H2/CO2体系中仍保持了良好的分离选择性(选择性约为20). 该研究为二维MOF材料的垂直构筑与高性能分离应用提供了新的理论基础与技术路径.

关键词: 膜分离, 气体分离, 金属有机框架(MOF)膜

Over 90% of global hydrogen (H2) production is derived from natural gas reforming, making efficient carbon removal and H2 purification crucial for high-purity hydrogen applications. Metal-organic framework (MOF) nanosheet membranes, with highly ordered porous structures, show great potential for H2 purification. Gas transport in conventional MOF nanosheet membranes is constrained by horizontal stacking, which severely limits gas mass transfer efficiency. Here we propose a fast current-driven synthesis strategy for in situ fabrication of vertically aligned MOF nanosheet membranes within a short duration of 10 min. The electric field assistance effectively induces linker deprotonation, thereby accelerating the nucleation and preferential growth of MOF nanosheets on the substrate. As the reaction progresses, the increasing spatial constraints hinder crystal lateral growth, compelling the crystal growth to preferentially proceed along the direction of minimal resistance. In other words, the growth orientation gradually transitions from an initially parallel arrangement to a vertically aligned structure. Compared with conventional horizontally stacked structure, the vertically aligned structure significantly shortens the gas diffusion pathways, effectively eliminating mass transfer limitations caused by horizontal stacking. The resulting vertically aligned copper 1,4-benzenedicarboxylate (CuBDC) nanosheet membrane exhibits outstanding H2 permeance of 1.5×10-6 mol•m-2•s-1•Pa-1, approximately 5 times higher than that of conventional nanosheet membranes with horizontally stacked structure. Meanwhile, the vertically aligned CuBDC nanosheet membrane maintains excellent selectivity in H2/CO2 separation, with a selectivity of ca. 20, driven by both adsorption and diffusion. Due to both the higher diffusion resistance of larger gas molecules and the strong interactions between metal sites and CO2 molecules, CO2 transport within the membrane is significantly hindered, while H2 molecules permeate more readily, ultimately resulting in enhanced H2/CO2 separation performance. This work not only confirms the critical role of vertically aligned structures in improving molecular transport efficiency but also provides new theoretical insight and a practical strategy for fabricating vertically aligned 2D MOF membranes for efficient gas separation.

Key words: membrane separation, gas separation, metal-organic framework (MOF) membrane