Abstract
Nanochannel membranes exhibit significant potential in osmotic energy generation, however, achieving an optimal balance between ion selectivity and flux remains challenging. Herein, heterostructured MOFs@MXene nanochannels were prepared via an optimized anodic electrodeposition method, which demonstrated a significant advancement in osmotic energy generation. The unique oriented porous MOFs expanded the interlayer spacing of MXene. The inherent negative charged surface of MXene fostered a synergistic effect that substantially enhanced ion selectivity and flux, achieving a significant diffusion potential of 340.2 mV. These improvements enable the membranes to achieve an impressive power density output of 25.3 W/m2 at a concentration gradient of 106 in KCl and 17.2 W/m2 at a gradient of 500 in NaCl. Furthermore, the membranes demonstrate an energy conversion efficiency of up to 45.1 %. Such structural and functional advancements underscore the potential of these heterostructured nanochannels in robust and efficient osmotic power generation, paving the way for applications in sustainable energy technologies.
Published Version
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