Solar-driven evaporation based on photothermal materials is emerging as a sustainable fresh water generation technology for alleviating water scarcity. To realize the efficient and stable desalination under omnidirectional illumination, here, a “Pinscreen”-inspired photothermal hollow fibers arrays has been developed for high-efficiency and stable solar-driven evaporation under omnidirectional illumination. In the photothermal arrays design, driven by the capillary action, water was automatically taken up through the lumen side of hydrophilic alumina hollow fiber coated with polypyrrole (PPy), which also shows high light-harvesting. Thanks to the designed morphology of arrays, the evaporation amount of PPy-AHFs arrays is over 0.65 g h⁻¹ even under parallel one-sun illumination. During a long-term desalination, photothermal hollow fibers arrays can realize controllable salt-precipitation attributed to ideal water transport. Our results of wettable photothermal hollow fibers arrays for efficient photothermal evaporation can be considered as a significant attempt to inspire the future development of novel photothermal materials in sustainable desalination.

以光热材料为基础的太阳能驱动蒸发正在成为一种可持续的淡水生产技术，以减轻水资源短缺。为了在全向照射下实现高效，稳定的脱盐，这里开发了一种受“ Pinscreen”启发的光热中空纤维阵列，用于在全向照射下高效，稳定的太阳能驱动蒸发。在光热阵列设计中，在毛细作用的驱动下，水自动通过涂有聚吡咯（PPy）的亲水性氧化铝空心纤维的内腔侧吸收，这也显示出很高的集光性。由于阵列的设计形态，PPy-AHFs阵列的蒸发量超过0.65 g h ^-1即使在平行的一轮阳光照射下。在长期淡化期间，光热中空纤维阵列可以实现归因于理想水传输的可控盐析。我们的可湿式光热中空纤维阵列用于有效光热蒸发的结果可以被认为是激发可持续脱盐领域新型光热材料未来发展的重大尝试。