Fang You-Peng, Liu Sheng-Hua, Liu Yan-Hong, Wang Ke-Xin, Hu Chun-Kui, Lu Chun-Xin, Qian Rusheng, Chen Xia-Chao
School of Materials Science & Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China.
College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, P. R. China.
ACS Omega. 2025 Jan 31;10(5):4722-4731. doi: 10.1021/acsomega.4c09750. eCollection 2025 Feb 11.
Photoinduced transmembrane ion transport in organisms provides a distinctive perspective for exploiting the ocean enriched with both ions and solar energy. Artificial two-dimensional nanofluidic membranes for photothermal-driven ion transport are facing issues such as interrupted nanofluidic transport and much dissipated heat. Peristome surface of Nepenthes enables stable wetting and rapid directional water transport correlated with orientational sophisticated flow-guiding microstructures, inspiring amelioration of these issues by regulating membrane topographies. A conformal layer-by-layer assembly is adopted to construct superstructured positively charged graphene oxide (PGO)/MXene membranes (SGMMs) that differ from topographies. These membranes enable anion-selective transport enhanced by superstructure configurations via providing more and wider nanofluidic channels than planar PGO/MXene membrane (PGMM). SGMMs with orientational superstructures demonstrate superior wetting performance and directional transport of surface microfluidics compared to PGMM, inducing directional ion transport within nanochannels. Additionally, this superstructure design assists SGMMs to outshine PGMM in photothermal evaporation conspicuously, benefiting from an enlarged surface area and well-regulated surface microfluidic distribution. Eventually, SGMMs enable more remarkable photothermal evaporation-driven ion transport facilitated by directional transport of surface microfluidics and efficient photothermal evaporation. This work emphasizes the significance of membrane topography design for nanofluidic transport toward exploiting the ocean including sunlight, water resources, and ionic energy.
生物体内的光致跨膜离子运输为开发富含离子和太阳能的海洋提供了独特的视角。用于光热驱动离子运输的人工二维纳米流体膜面临着诸如纳米流体运输中断和大量热耗散等问题。猪笼草的口缘表面能够实现稳定的润湿和与复杂的定向导流微结构相关的快速定向水运输，这启发了通过调节膜的形貌来改善这些问题。采用逐层共形组装法构建了与形貌不同的超结构带正电氧化石墨烯（PGO）/MXene膜（SGMMs）。这些膜通过提供比平面PGO/MXene膜（PGMM）更多、更宽的纳米流体通道，实现了由超结构配置增强的阴离子选择性运输。与PGMM相比，具有定向超结构的SGMMs表现出优异的润湿性能和表面微流体的定向运输，从而在纳米通道内诱导定向离子运输。此外，这种超结构设计有助于SGMMs在光热蒸发方面明显优于PGMM，这得益于其增大的表面积和良好调节的表面微流体分布。最终，SGMMs通过表面微流体的定向运输和高效的光热蒸发实现了更显著的光热蒸发驱动的离子运输。这项工作强调了膜形貌设计对于纳米流体运输以开发包括阳光、水资源和离子能在内的海洋的重要性。
