Solar‐driven interfacial steam generation is emerging as a sustainable and environmental‐friendly technology for potential applications in sterilization, desalination, and wastewater treatment. Despite the impressive progress achieved at labs, only few designs specialize in ambient and outdoor applications. Herein, a 3D hemispheric steam generator composed of nanocarbon (CB):poly(methyl methacrylate) (PMMA) composite materials as a light‐absorber, which boosts the light absorption in a wide range of incident angles, is reported. Gratifyingly, the 3D hemispheric steam generator afford efficient water evaporation and high photothermal conversion efficiencies of ≈87% when employing moderate sunlight (0.75 sun) with varied incident angles (90°, 80°, and 65°) in a set of indoor measurements. The more hydrophobic surface of the light‐absorber enabled by PMMA leads to better durability and avoids significant salt accumulation for solar desalination. This work highlights the intriguing prospect of this novel 3D hemispheric design and elegant organic–inorganic composite concept to realize efficient clean water production for potential real‐world applications.

中文翻译：

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基于有机-无机复合吸光剂的3D半球形蒸汽发生器，可实现高效的太阳能蒸发和淡化

太阳能驱动的界面蒸汽产生正在成为一种可持续，环保的技术，可用于杀菌，淡化和废水处理的潜在应用。尽管实验室取得了令人瞩目的进步，但只有少数设计专门用于环境和室外应用。本文报道了一种由纳米碳（CB）：聚甲基丙烯酸甲酯（PMMA）复合材料作为吸光剂的3D半球形蒸汽发生器，它可以在宽广的入射角范围内提高光吸收率。令人欣慰的是，当在一组室内测量中使用入射角（90°，80°和65°）变化的中度阳光（0.75太阳）时，3D半球形蒸汽发生器可提供有效的水蒸发和≈87％的高光热转换效率。PMMA使吸光剂的疏水性更强，从而提高了耐用性，并避免了大量盐分积聚以进行海水淡化。这项工作凸显了这种新颖的3D半球设计和优雅的有机-无机复合概念的迷人前景，从而可以为潜在的实际应用实现有效的清洁水生产。