Xie Mingzhu, Wang Xiaolong, Qian Zicheng, Zhan Ziheng, Xie Qihui, Wang Xiaowei, Shuai Yong, Wang Zhaolong
College of Mechanical and Vehicle Engineering, Hunan University, Changsha, 410082, P. R. China.
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China.
Small. 2025 Feb;21(8):e2406844. doi: 10.1002/smll.202406844. Epub 2024 Oct 6.
The urgent need for sustainable energy storage drives the fast development of diverse hydrogen production based on clean water resources. Herein, a unique type of multi-bioinspired functional device (MFD) is reported with asymmetric wettability that combines the curvature gradient of cactus spines, the wetting gradient of lotus, and the slippery surface of Nepenthes alata for efficient fog harvesting. The precisely printed MFDs with microscale features, spanning dimensions, and a thin wall are endowed with asymmetric wettability to enable the Janus effects on their surfaces. Fog condenses on the superhydrophobic surface of the MFDs in the form of microdroplets and unidirectionally penetrates its interior due to the Janus effects, and drops onto the designated area with a better fog harvesting rate of 10.64 g cm h. Most significantly, the collected clean water can be used for hydrogen production with excellent stability and durability. The findings demonstrate that safe, large-scale, high-performance water splitting and gas separation and collection with fog collection based on MFDs are possible.
对可持续储能的迫切需求推动了基于清洁水资源的多种制氢方式的快速发展。在此，报道了一种独特的多生物启发功能装置（MFD），其具有不对称润湿性，结合了仙人掌刺的曲率梯度、荷叶的润湿梯度以及猪笼草的光滑表面，以实现高效的雾气收集。具有微尺度特征、跨维度和薄壁的精确印刷MFD具有不对称润湿性，从而在其表面产生雅努斯效应。雾气以微滴的形式凝结在MFD的超疏水表面上，并由于雅努斯效应单向渗透到其内部，以10.64 g cm h的更佳雾气收集速率滴落到指定区域。最重要的是，收集到的清洁水可用于制氢，具有出色的稳定性和耐久性。研究结果表明，基于MFD进行安全、大规模、高性能的水分解以及通过雾气收集进行气体分离和收集是可行的。
