Maximizing Ion Permselectivity in MXene/MOF Nanofluidic Membranes for High-Efficient Blue Energy Generation

Jiale Zhou; Junran Hao; Rong WuLiying SuJie WangMing QiuBin BaoChengyun NingChao TengYahong ZhouLei Jiang

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Maximizing Ion Permselectivity in MXene/MOF Nanofluidic Membranes for High-Efficient Blue Energy Generation

机译：Maximizing Ion Permselectivity in MXene/MOF Nanofluidic Membranes for High-Efficient Blue Energy Generation

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Both ion permeability and selectivity of membranes are crucial for nanofluidicbehavior. However, it remains a long-standing challenge for 2D materials tobalance these two factors for osmotic energy harvesting. Herein, the MXene/metal–organic framework (MOF) hybrid membranes are reported to realizeefficient ion-permselective nanofluidic system, leading to high-performanceosmotic power generator. In the system, zeolitic imidazolate framework-8(ZIF-8) is deposited onto the MXene surface and intercalated between theMXene nanosheets by electropolymerization approach. The angstrom-sizedwindows of ZIF-8 layer act as ion selectivity filters, endowing the membranewith high cation selectivity by size effect. The intercalation of ZIF-8 crystals,reduces the interspacing of MXene, therefore, not only enhancing the ionpermeability by shortening the ion transport pathway through the membrane,but also further improving the selectivity by increasing the overlap effect ofelectric-double layer. The maximum power density reaches up to 48.05 W m~(?2)under 500-fold salinity gradient with a high permeability (1263.3 A m~(?2)), anda high selectivity of 0.906 at 50-fold is obtained. This study provides a facilemethod to fabricate nanofluidic 2D membranes with both high ion permeabilityand selectivity for water nexus energy conversion.

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《Advanced functional materials》 |2022年第49期|2209767.1-2209767.8|共8页
作者
Jiale Zhou; Junran Hao; Rong WuLiying SuJie WangMing QiuBin BaoChengyun NingChao TengYahong ZhouLei Jiang;
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Key Laboratory of Bio-inspired Materials and Interfacial ScienceTechnical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190, P. R. China;

Key Laboratory of Bio-inspired Materials and Interfacial ScienceTechnical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190, P. R. China Beijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijing 10019;

College of Materials Science and EngineeringQingdao University of Science and TechnologyQingdao 266042, P. R. ChinaBeijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijing 100191, P. R. ChinaSchool of Molecular Science and EngineeringSouth China University of TechnologyGuangzhou 510640, P. R. China;

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2D membranes; electrochemical polymerization; maximizing ionpermselectivities; metal–organic frameworks; osmotic energy conversions;

Maximizing Ion Permselectivity in MXene/MOF Nanofluidic Membranes for High-Efficient Blue Energy Generation

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