Solar-driven freshwater harvesting has emerged as an effective and sustainable technology to mitigate global water scarcity due to its high energy conversion efficiency. Nevertheless, achieving mutual reinforcement of photothermal and photocatalysis processes is in high demand because the contamination of harmful and highly concentrated volatile organic compounds (VOCs) will inevitably evaporate and condense alongside water. Herein, an integrated 3D-honeycomb fabric (NPPF) evaporator decorated with polydopamine (PDA), polypyrrole (PPy), and hydrotalcite (LDH) nanoflowers was designed innovatively by synergistically cooperating photothermal evaporation and advanced catalytic oxidation techniques. With periodically concave arrays, it can create the maximum level of light-trapping through multiple scattering and omnidirectional light absorption, thereby increasing its photothermal catalytic degradation ability. Meanwhile, introducing the LDH nanoflowers boosted the photothermal evaporation capacity of the NPPF evaporator. Therefore, it demonstrated high solar absorption efficiency of ∼98.02% and an evaporation rate of ∼2.02 kg m h under one sun. Furthermore, it can achieve superb degradation activity, especially for high-concentration VOCs, with efficiency of ∼93.99%, surpassing most of the other evaporators reported previously. Besides, the outdoor experiment demonstrated its practicability. More importantly, it can remove tetracycline and phenol with efficiency of ∼98.85% and ∼ 92.06%. The advantages make this evaporator a promising representative for cooperative freshwater production.

中文翻译：

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3D 蜂窝结构蒸发器可相互增强蒸发和催化作用，实现高效淡水收集

太阳能驱动的淡水收集因其高能量转换效率而成为缓解全球水资源短缺的有效且可持续的技术。然而，实现光热和光催化过程的相互增强的需求很高，因为有害且高浓度的挥发性有机化合物（VOC）的污染将不可避免地与水一起蒸发和凝结。在此，通过光热蒸发和先进催化氧化技术的协同配合，创新地设计了一种装饰有聚多巴胺（PDA）、聚吡咯（PPy）和水滑石（LDH）纳米花的集成3D蜂窝织物（NPPF）蒸发器。通过周期性凹面阵列，它可以通过多重散射和全向光吸收产生最大程度的光捕获，从而提高其光热催化降解能力。同时，LDH纳米花的引入提高了NPPF蒸发器的光热蒸发能力。因此，它表现出~98.02%的高太阳能吸收效率和在一个太阳下的蒸发速率~2.02 kg·m·h。此外，它可以实现优异的降解活性，特别是对于高浓度VOC，效率高达~93.99%，超过了之前报道的大多数其他蒸发器。此外，室外实验也证明了其实用性。更重要的是，它可以去除四环素和苯酚，效率分别为~98.85%和~92.06%。这些优点使该蒸发器成为合作淡水生产的有前途的代表。