Jin Wang, Zeyuan Song, Miaolu He, Yongchao Qian, Di Wang, Zheng Cui, Yuan Feng, Shangzhen Li, Bo Huang, Xiangyu Kong, Jinming Han, Lei Wang
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引用次数: 0
摘要
纳米流体膜为渗透能量转换提供了非凡的前景,但平衡离子选择性和渗透性的挑战依然存在。在此,我们提出了一种基于二维(2D)四(4-羧基苯基)卟啉铜框架(Cu-TCPP)的仿生纳米流体系统。固有的纳米多孔结构和水平层间通道赋予了 Cu-TCPP 膜超高的离子渗透性,使其功率密度达到 16.64 W m-2,超过了最先进的纳米通道膜。此外,利用 Cu-TCPP 的光热特性,即使在自然阳光下也能实现光控离子主动传输。通过将太阳能与盐度梯度相结合,离子传输的驱动力得到了加强,从而进一步提高了能量转换性能。值得注意的是,光甚至可以消除对盐度梯度的需求,在对称溶液系统中实现 0.82 W m-2 的功率密度。我们的研究为开发先进的太阳能/离子能转换膜引入了一个新的视角,并将盐度能的概念扩展为离子能的概念。
Light-responsive and ultrapermeable two-dimensional metal-organic framework membrane for efficient ionic energy harvesting
Nanofluidic membranes offer exceptional promise for osmotic energy conversion, but the challenge of balancing ionic selectivity and permeability persists. Here, we present a bionic nanofluidic system based on two-dimensional (2D) copper tetra-(4-carboxyphenyl) porphyrin framework (Cu-TCPP). The inherent nanoporous structure and horizontal interlayer channels endow the Cu-TCPP membrane with ultrahigh ion permeability and allow for a power density of 16.64 W m−2, surpassing state of-the-art nanochannel membranes. Moreover, leveraging the photo-thermal property of Cu-TCPP, light-controlled ion active transport is realized even under natural sunlight. By combining solar energy with salinity gradient, the driving force for ion transport is reinforced, leading to further improvements in energy conversion performance. Notably, light could even eliminate the need for salinity gradient, achieving a power density of 0.82 W m−2 in a symmetric solution system. Our work introduces a new perspective on developing advanced membranes for solar/ionic energy conversion and extends the concept of salinity energy to a notion of ionic energy.
期刊介绍:
Nature Communications, an open-access journal, publishes high-quality research spanning all areas of the natural sciences. Papers featured in the journal showcase significant advances relevant to specialists in each respective field. With a 2-year impact factor of 16.6 (2022) and a median time of 8 days from submission to the first editorial decision, Nature Communications is committed to rapid dissemination of research findings. As a multidisciplinary journal, it welcomes contributions from biological, health, physical, chemical, Earth, social, mathematical, applied, and engineering sciences, aiming to highlight important breakthroughs within each domain.