The escalating scarcity of freshwater resources presents significant challenges to global sustainability, demanding innovative solutions by integrating cutting-edge materials and technologies. Here we introduce an autonomous artificial forest (3D AF) for continuous freshwater acquisition. This system features a three-dimensional (3D) architecture incorporating a carbon nanofiber (CNF) network and MXene@polypyrrole (Ti₃C₂@PPy), enhancing surface area, light absorption, heat distribution, and surface wettability to improve solar vapor generation and fog collection efficiency. The autonomous operation is facilitated by an integrated photothermal actuator that adjusts to the day and night conditions. During daylight, the 3D AF tilts downward to maximize solar exposure for water evaporation, while at night, it self-adjusts to optimize fog particle collection. Notably, our device demonstrates the ability to harvest over 5.5 L m⁻² of freshwater daily outdoors. This study showcases the potential of integrating advanced materials and technologies to address pressing global freshwater challenges, paving the way for future innovations in water harvesting.

淡水资源的日益短缺对全球可持续发展提出了重大挑战，需要通过整合尖端材料和技术来提供创新解决方案。在这里，我们介绍了一种用于连续获取淡水的自主人工林（3D AF）。该系统采用三维 (3D) 架构，结合碳纳米纤维 (CNF) 网络和 MXene@聚吡咯 (Ti ₃ C ₂ @PPy)，增强表面积、光吸收、热量分布和表面润湿性，以改善太阳能蒸汽的产生和雾收集效率。集成光热执行器可根据白天和夜间条件进行调整，从而促进自主操作。在白天，3D AF 向下倾斜，以最大限度地增加水蒸发的阳光照射，而在夜间，它会自我调整以优化雾颗粒收集。值得注意的是，我们的设备展示了每天在户外收集超过 5.5 L m ⁻²淡水的能力。这项研究展示了整合先进材料和技术来解决紧迫的全球淡水挑战的潜力，为未来集水创新铺平了道路。