<br>MOF-303 膜在多孔阳极氧化铝基板上原位生长以收集盐度梯度能量,ACS Applied Materials & Interfaces

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MOF-303 膜在多孔阳极氧化铝基板上原位生长以收集盐度梯度能量
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-12-15 , DOI: 10.1021/acsami.3c13935
Boting Pan ₁ , Jian Wang ₁ , Chenling Yao ₁ , Shangtao Zhang ₁ , Rong Wu ₁ , Huan Zeng ₁ , Di Wang ₁ , Caiqin Wu ₁

Affiliation

MOF-303膜作为近年来新兴的金属有机骨架（MOF）材料，在海水淡化、脱水和大气集水等方面显示出巨大的潜在应用前景。在此，我们报道了一种致密且均匀的 MOF-303 膜，通过简便的原位水热合成方法在阳极氧化铝 (AAO) 通道膜作为唯一的铝源和基材的情况下制备。有趣的是，由于AAO基材的亲水性较差且孔径较大，导致有机配体量不足，因此可以获得MOF-303异构体。基于 MOF 的复合膜具有表面电荷控制的离子传输行为。此外，MOF-303/AAO膜在50倍KCl浓度梯度下产生1.87 W/m ²的输出功率密度。在人工海水和河水50倍梯度下，可以获得1.46 W/m ²的最大功率密度。经过30天的稳定性测试，复合膜仍然保持功率输出，功率密度高于1.20 W/m ² 。这项工作为构建铝基 MOF 复合膜提供了一种简便有效的策略，并促进了其在收集盐度梯度能量方面的应用。

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In Situ Growth of MOF-303 Membranes onto Porous Anodic Aluminum Oxide Substrates for Harvesting Salinity-Gradient Energy

As an emerging metal–organic framework (MOF) material in recent years, the MOF-303 membrane has shown great potential applications in seawater desalination, dehydration, and atmospheric water harvesting. Herein, we report on a dense and uniform MOF-303 membrane fabricated by a facile in situ hydrothermal synthesis approach in the presence of an anodized aluminum oxide (AAO) channel membrane acting as the only Al source and substrate. Interestingly, the MOF-303 isomer can be obtained due to an insufficient amount of organic ligand caused by the less hydrophilic and larger pore size of the AAO substrate. The MOF-based composite membranes possessed surface-charge-governed ionic transport behavior. Moreover, the MOF-303/AAO membrane yielded an output power density of 1.87 W/m² under a 50-fold KCl concentration gradient. Under a 50-fold gradient of artificial seawater and river water, a maximum power density of 1.46 W/m² can be obtained. After 30 days of stability testing, the composite membrane still maintained the power output, and the power density was higher than 1.20 W/m². This work provides a facile and effective strategy for constructing Al-based MOF composite membranes and boosts their applications in harvesting salinity-gradient energy.

更新日期：2023-12-15

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