Omertassov Dias D, Shakayeva Aigerim Kh, Zhatkanbayeva Zhanna K, Shakirzyanov Rafael I, Zdorovets Maxim V, Güven Olgun, Korolkov Ilya V
The Institute of Nuclear Physics, Ibragimov str. 1, Almaty 050032, Kazakhstan.
L.N. Gumilyov Eurasian National University, Satbaev str. 5, Astana 010008, Kazakhstan.
ACS Omega. 2025 Jul 11;10(28):30259-30271. doi: 10.1021/acsomega.5c01493. eCollection 2025 Jul 22.
Climate change remains one of the most critical global challenges, largely driven by the rise in atmospheric CO levels. Effective strategies for capturing and utilizing CO are crucial to mitigate its environmental impact. Metal-organic frameworks (MOFs), particularly HKUST-1 (MOF-199), are promising materials due to their high surface area, porosity, and tunable properties. In this study, HKUST-1 was successfully immobilized on polyethylene terephthalate (PET) track-etched membranes, leveraging the membranes' well-defined porosity and chemical stability. Membrane characterization via SEM revealed uniform coverage of octahedral HKUST-1 crystals with sizes ranging from 0.15 μm (inside the pores) to 1.5-5 μm (on the surface of the membrane). BET analysis of the PET TeMs-HKUST-1 composite membrane indicated a specific surface area of up to 382 m/g. XRD confirmed the crystallinity of the HKUST-1 structure. The composite membranes exhibited CO sorption capabilities, with an adsorption capacity of 0.53 ± 0.03 mmol/g (after 1 h of adsorption) in the first cycle for the solvothermal method and 0.31 ± 0.02 mmol/g (after 1 h of adsorption) for the solvoshaker method. Durability tests demonstrated a stable performance over 12 adsorption-desorption cycles. These results highlight the potential of PET TeMs-HKUST-1 composite membranes for scalable and efficient CO capture, contributing to the development of sustainable solutions for addressing climate change.
气候变化仍然是最关键的全球挑战之一，主要由大气中二氧化碳水平的上升所驱动。捕获和利用二氧化碳的有效策略对于减轻其环境影响至关重要。金属有机框架（MOF），特别是HKUST-1（MOF-199），由于其高比表面积、孔隙率和可调节的性质而成为有前景的材料。在本研究中，利用聚对苯二甲酸乙二酯（PET）径迹蚀刻膜明确的孔隙率和化学稳定性，成功地将HKUST-1固定在该膜上。通过扫描电子显微镜（SEM）对膜进行表征，结果显示八面体HKUST-1晶体均匀覆盖，其尺寸范围从0.15μm（孔内）到1.5 - 5μm（膜表面）。对PET TeMs-HKUST-1复合膜的比表面积分析（BET）表明其比表面积高达382 m²/g。X射线衍射（XRD）证实了HKUST-1结构的结晶性。复合膜表现出二氧化碳吸附能力，对于溶剂热法，在第一个循环中吸附1小时后的吸附容量为0.53±0.03 mmol/g，对于溶剂摇床法，吸附1小时后的吸附容量为0.31±0.02 mmol/g。耐久性测试表明在12次吸附-解吸循环中性能稳定。这些结果突出了PET TeMs-HKUST-1复合膜在可扩展且高效的二氧化碳捕获方面的潜力，有助于开发应对气候变化的可持续解决方案。
