Ultrahigh Metal-Organic Framework Loading and Flexible Nanofibrous Membranes for Efficient CO2 Capture with Long-Term, Ultrastable Recyclability.
Ultrahigh Metal-Organic Framework Loading and Flexible Nanofibrous Membranes for Efficient CO2 Capture with Long-Term, Ultrastable Recyclability.
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DOI：
10.1021/acsami.8b14197
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发表时间：
2018-09
影响因子：
9.5
通讯作者：
Yuge Zhang;Yufei Zhang;Xianfeng Wang;Jianyong Yu;B. Ding
中科院分区：
文献类型：
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作者：
Yuge Zhang;Yufei Zhang;Xianfeng Wang;Jianyong Yu;B. Ding
在全球向可持续低碳经济转型的过程中，二氧化碳捕获和封存技术在减少排放方面发挥着关键作用。金属有机框架（MOF）是具有超高孔隙率、可调孔径和丰富功能的晶体材料，有望捕获二氧化碳。然而，MOF 晶体固有的脆性和加工性能较差，使得柔性 MOF 纳米纤维膜 (NFM) 的制造相当具有挑战性。在此，我们展示了一种有效的策略，通过静电纺丝、多步种子生长和活化过程的结合，多功能制备自支撑和柔性 HKUST-1 NFM，具有超高 HKUST-1 负载量（高达 82 wt%）和稳定均匀的 HKUST-1 生长。 MOF的负载率是已报道的类似物中最高的。值得注意的是，HKUST-1 NFM 表现出出色的 CO2 吸附能力（3.9 mmol g-1）、良好的 CO2/N2 选择性和显着的可回收性。经过100次吸附-解吸循环后，CO2容量仍保持初始值的~95%（3.7 mmol g-1），表明HKUST-1 NFM具有长期超稳定的可回收性，具有显着的实用价值。因此，低成本且可扩展的生产途径能够将MOF颗粒转化为自支撑且灵活的NFM，从而更好地应用于燃烧后CO2的高效捕集。
In the global transition to a sustainable low-carbon economy, CO2 capture and storage technology plays a key role in reducing emissions. Metal-organic frameworks (MOFs) are crystalline materials with ultrahigh porosity, tunable pore size, and rich functionalities, holding the promise for CO2 capture. However, the intrinsic fragility and depressed processability of MOF crystals make the fabrication of the flexible MOF nanofibrous membrane (NFM) rather challenging. Herein, we demonstrate an effective strategy for the versatile preparation of self-supported and flexible HKUST-1 NFM with ultrahigh HKUST-1 loading (up to 82 wt %) and stable and uniform HKUST-1 growth through the combination of electrospinning, multistep seeded growth, and activation process. The loading rate of MOF is the highest level among the reported analogues. Significantly, the HKUST-1 NFM exhibits a prominent CO2 adsorption capacity of 3.9 mmol g-1, good CO2/N2 selectivity, and remarkable recyclability. The CO2 capacity retains ∼95% (3.7 mmol g-1) of the initial value after 100 adsorption-desorption cycles, indicating that the HKUST-1 NFM has long-term and ultrastable recyclability and a significant practical value. Thus, the low-cost and scalable production pathway is able to convert MOF particles into self-supported and flexible NFMs, and thereby, they are better applied to the efficient postcombustion CO2 capture.