卟啉
纳米孔
膜
选择性
金属有机骨架
光化学
材料科学
化学
化学工程
多孔性
阳极
功率密度
阴极保护
纳米技术
有机化学
复合材料
电极
吸附
催化作用
功率(物理)
物理化学
工程类
物理
量子力学
生物化学
作者
Zhongqiu Li,Guan-Long Zhu,Rijian Mo,Mingyang Wu,Xin-Lei Ding,Liuqing Huang,Zeng-Qiang Wu,Xing‐Hua Xia
标识
DOI:10.1002/anie.202202698
摘要
High ion selectivity and permeability, as two contradictory aspects for the membrane design, highly hamper the development of osmotic energy harvesting technologies. Metal-organic frameworks (MOFs) with ultra-small and high-density pores and functional surface groups show great promise in tackling these problems. Here, we propose a facile and mild cathodic deposition method to directly prepare crack-free porphyrin MOF membranes on a porous anodic aluminum oxide for osmotic energy harvesting. The abundant carboxyl groups of the functionalized porphyrin ligands together with the nanoporous structure endows the MOF membrane with high cation selectivity and ion permeability, thus a large output power density of 6.26 W m-2 is achieved. The photoactive porphyrin ligands further lead to an improvement of the power density to 7.74 W m-2 upon light irradiation. This work provides a promising strategy for the design of high-performance osmotic energy harvesting systems.
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