Scholarlink

<p>Oriented metal-organic framework (MOF) membranes hold significant promise for advanced helium (He) separation, but their synthesis remains a challenging task. We report the preparation of an oriented MOF membrane using metal-organic polyhedra (MOP) fragment as metallocene-anchor. The metallocene-anchor induces the growth of homoligand Zr-MOF along the c-axis, resulting in the {001}-oriented structure. This orientation increases the transition energy barrier of methane (CH<sub>4</sub>), enabling precise He/CH<sub>4</sub> separation with a selectivity of 77.3 and a He permeance of 695.1 GPU. The membrane exhibits exceptional robustness, demonstrating resistance to high-pressure conditions (up to 40 bar), thermal shock (−25 °C to 85 °C), and long-term stability (1000 h). The separation performance surpasses that of existing MOF membranes and exceeds the Robeson upper bound. Additionally, a three-stage membrane process enables the concentration of low He concentrations of 0.3% up to 99.9%, highlighting the potential of membranes for helium extraction. The successful fabrication of various oriented MOF membranes indicates the universality of this strategy.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Metallocene-anchor inducing oriented MOF membrane for helium separation

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年10月27日

查看全文
  • Ju Bai,
  • Luqi Xiao,
  • Xiangping Zhang,
  • Hongyan Liu,
  • Can Wang,
  • Lili Gong,
  • Shuangjiang Luo,
  • Yihan Zhu,
  • Linglong Shan,
  • Hongwei Fan,
  • Suojiang Zhang

摘要

Oriented metal-organic framework (MOF) membranes hold significant promise for advanced helium (He) separation, but their synthesis remains a challenging task. We report the preparation of an oriented MOF membrane using metal-organic polyhedra (MOP) fragment as metallocene-anchor. The metallocene-anchor induces the growth of homoligand Zr-MOF along the c-axis, resulting in the {001}-oriented structure. This orientation increases the transition energy barrier of methane (CH4), enabling precise He/CH4 separation with a selectivity of 77.3 and a He permeance of 695.1 GPU. The membrane exhibits exceptional robustness, demonstrating resistance to high-pressure conditions (up to 40 bar), thermal shock (−25 °C to 85 °C), and long-term stability (1000 h). The separation performance surpasses that of existing MOF membranes and exceeds the Robeson upper bound. Additionally, a three-stage membrane process enables the concentration of low He concentrations of 0.3% up to 99.9%, highlighting the potential of membranes for helium extraction. The successful fabrication of various oriented MOF membranes indicates the universality of this strategy.