Solar‐driven vapor generation is a promising method to mitigate freshwater shortage and water contamination. However, most of the current highly efficient solar evaporators suffer from low robustness, tedious preparation procedures, and high cost. In this study, an easy‐to‐manufacture, low‐cost, and high‐reliability solar‐driven evaporator is designed using a black cotton towel with a hollow conical shape. The reactive dye molecules diffuse into the cotton and form strong covalent bonds with the fiber after dyeing, which firmly fixes light‐absorbing materials on the substrate. The looped pile structure of towels and hierarchical structure of yarns enable the evaporator enlarged surface area. The hollow conical shape of the cotton towel can effectively suppress the heat loss to the environment without compromising light absorption. The 3D vapor generator exhibits an evaporation rate of 1.40 and 1.27 kg m⁻² h⁻¹ for pure water and saline water, respectively. Meanwhile, this towel‐based solar‐driven evaporator exhibits a promising antifouling property as well as superior reusability and provides a reliable pathway in dealing with realistic waters, such as seawater and dyeing sewage. Therefore, the low‐cost, solar‐driven water evaporation system offers a complementary approach for high‐efficiency vapor generation and water purification in practical application.

中文翻译：

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使用 3D 染色棉毛巾实现低成本、高效率的太阳能驱动蒸汽产生。

太阳能驱动的蒸汽产生是缓解淡水短缺和水污染的一种有前途的方法。然而，目前大多数高效太阳能蒸发器都存在鲁棒性低、制备过程繁琐、成本高等问题。在这项研究中，使用空心圆锥形的黑色棉毛巾设计了一种易于制造、低成本且高可靠性的太阳能驱动蒸发器。活性染料分子扩散到棉中，染色后与纤维形成牢固的共价键，将吸光材料牢固地固定在基材上。毛巾的毛圈结构和纱线的分层结构使蒸发器的表面积增大。棉毛巾的空心圆锥形状可以有效抑制向环境的热量散失，同时又不影响光吸收。3D蒸汽发生器对于纯水和盐水的蒸发率分别为1.40和1.27 kg m ^-2 h ^{-1 。}同时，这种基于毛巾的太阳能驱动蒸发器表现出良好的防污性能和卓越的可重复使用性，为处理海水和印染污水等现实水域提供了可靠的途径。因此，低成本、太阳能驱动的水蒸发系统为实际应用中的高效蒸汽产生和水净化提供了补充方法。