Freshwater shortage has been a terrible threat for the sustainable progress and development of human society in 21st century. Inspired from natural creatures, harvesting water from atmosphere has been a feasible and effective method to alleviate water shortage crisis. However, the recent works related to water collection just focuses on how to optimize fog-harvesting manners and efficiencies, the safety and availability of collected water are always ignored. In this paper, we proposed a new strategy accessed to freshwater resources through combining water collection and purification together on eco-friendly superwettable material inspired by cactus spines and desert beetles. Six superhydrophilic wedge-shaped patterns prepared by P25 TiO₂ nanoparticles (NPs) were constructed on candle soot@polydimethylsiloxane (CS@PDMS) superhydrophobic coating. The special superhydrophilic regions not only effectively captured water from foggy environment but generated Laplace pressure gradient to faster drive water away. The bioinspired material exhibited an efficient water collection rate (WCR) of 14.9 ± 0.2 mg min⁻¹ cm⁻², which was 5.3 and 2.5 times larger than that on uniformed superhydrophilic and superhydrophobic surfaces, respectively. Because of the existence of photocatalytic P25 NPs in wetting areas, the harvested wastewater containing nine kinds of pesticides (0.5 mg/L) could be purified in low concentrations (< 5%) under UV light (365 nm, 5.0 ± 0.6 mW cm⁻²). Ten zebrafishes were still alive in such purified water for 72 hr, as a contrast, the same number of fishes would almost die in untreated harvested wastewater in just 7 hr. This work indeed opens up a new sight to freshwater accessibility, aiming to a promising project for alleviating water shortage around the world.

淡水短缺已成为21世纪人类社会可持续进步和发展的可怕威胁。受自然生物的启发，从大气中取水已成为缓解缺水危机的一种可行且有效的方法。然而，近期与集水相关的工作只关注如何优化集雾方式和效率，而始终忽视了集水的安全性和可用性。在本文中，我们提出了一种利用受仙人掌刺和沙漠甲虫启发的环保超润湿材料集水和净化相结合的淡水资源获取新策略。P25 TiO ₂制备的六个超亲水楔形图案纳米颗粒（NPs）构建在蜡烛烟灰@聚二甲基硅氧烷（CS@PDMS）超疏水涂层上。特殊的超亲水区域不仅有效地从有雾的环境中捕获水，而且产生拉普拉斯压力梯度以更快地将水驱走。仿生材料表现出14.9 ± 0.2 mg min ^-1 cm ^-2的有效水收集率（WCR），分别是均匀超亲水和超疏水表面的5.3和2.5倍。由于在润湿区域存在光催化 P25 NPs，在紫外光（365 nm，5.0 ± 0.6 mW cm ^{- 2}）。10 条斑马鱼在这种纯净水中仍然存活 72 小时，相比之下，相同数量的鱼几乎会在未经处理的废水中死亡 7 小时。这项工作确实为淡水可及性开辟了新视野，旨在成为缓解世界各地水资源短缺的一个有前途的项目。