Sustainable Wood-Based Hierarchical Solar Steam Generator: A Biomimetic Design with Reduced Vaporization Enthalpy of Water.,Nano Letters

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Sustainable Wood-Based Hierarchical Solar Steam Generator: A Biomimetic Design with Reduced Vaporization Enthalpy of Water.
Nano Letters ( IF 9.6 ) Pub Date : 2020-07-08 , DOI: 10.1021/acs.nanolett.0c01088
Qing-Fang Guan ₁ , Zi-Meng Han ₁ , Zhang-Chi Ling ₁ , Huai-Bin Yang ₁ , Shu-Hong Yu ₁

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Water purification by solar distillation is considered a promising technology for producing clean water from undrinkable water resources. A solar steam generator is a central part of a solar distillation process to separate water and contaminants. Here, we report an efficient and sustainable hierarchical solar steam generator (HSSG) with reduced vaporization enthalpy based on bacterial cellulose (BC) nanocomposites. The nanomaterials are assembled with BC nanofibers produced by bacteria in situ to form nanocomposites. Using this method, we construct functional BC nanocomposites inside and on the natural porous structure of wood. Our HSSG integrates solar-to-vapor efficiency improvement and vaporization enthalpy reduction by integrating the hierarchical multifunctional BC nanocomposites with the natural porous structure of wood. Because of the biomimetic design, hierarchical structure and reduced vaporization enthalpy of HSSG, a high evaporation rate of 2.9 kg m^–2 h^–1 and solar-to-vapor efficiency of 80% is achieved.

中文翻译：

可持续的木质分层太阳能蒸汽发生器：仿生设计，减少了水的汽化焓。

通过太阳能蒸馏提纯水被认为是从不可饮用的水资源生产清洁水的有前途的技术。太阳能蒸汽发生器是太阳能蒸馏过程中分离水和污染物的核心部分。在这里，我们报告基于细菌纤维素（BC）纳米复合材料的降低了蒸发焓的高效且可持续的分层太阳能蒸汽发生器（HSSG）。纳米材料与细菌原位产生的BC纳米纤维组装在一起，形成纳米复合材料。使用这种方法，我们可以在木材的天然多孔结构内部和内部构造功能性BC纳米复合材料。我们的HSSG通过将多层多功能BC纳米复合材料与木材的天然多孔结构整合在一起，将太阳能转化效率提高和汽化焓降低集成在一起。^–2 h ^–1，达到80％的太阳能转化效率。

更新日期：2020-08-12

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