Blackbody-Inspired Array Structural Polypyrrole-Sunflower Disc with Extremely High Light Absorption for Efficient Photothermal Evaporation.,ACS Applied Materials & Interfaces

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Blackbody-Inspired Array Structural Polypyrrole-Sunflower Disc with Extremely High Light Absorption for Efficient Photothermal Evaporation.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-09-17 , DOI: 10.1021/acsami.0c11549
Yali Chen ₁ , Guomeng Zhao ₁ , Lipei Ren ₁ , Hongjun Yang ₁ , Xingfang Xiao _{1,

2} , Weilin Xu ₁

Affiliation

The three-dimensional (3D) structural design of solar evaporators has been considered as one of the most promising approaches toward enhancing photothermal performance by improving light absorption and the available evaporation area. Herein, polypyrrole-decorated 3D array structural sunflower discs (PPy-SFD) were prepared for solar steam generation, thereby turning SFD biomass waste into valuable materials. The SFD can absorb a majority of the incident light because of numerous light reflections from each natural 3D array structural unit, and therefore behaves similar to a blackbody. Moreover, a facile pyrrole polymerization method was introduced to further improve SFD light absorption and enhance the photothermal performance of SFD. This circumvents expensive consumption fabrication processes. The black PPy-decorated SFD shows a light absorption of 99.3% across the entire solar spectrum coupled with mechanical stability. During photothermal evaporation, the increased evaporation area of the 3D array structural SFD could effectively reduce heat loss to the environment because the inherent microporous structure of the SFD leaves and cellulose hydrophilicity provide channels for water transport. The PPy-SFD-based evaporator could reach an evaporation rate of 1.74 kg m^–2 h^–1 under 1 sun. Thus, the 3D array structural PPy-SFD is a possible candidate for high-efficiency photothermal evaporators.

中文翻译：

受黑体启发的阵列结构聚吡咯-向日葵圆盘，具有极高的光吸收率，可有效进行光热蒸发。

太阳能蒸发器的三维（3D）结构设计被认为是通过改善光吸收和可用蒸发面积来增强光热性能的最有前途的方法之一。在这里，准备了聚吡咯修饰的3D阵列结构向日葵盘（PPy-SFD）来产生太阳能蒸汽，从而将SFD生物质废物转化为有价值的材料。由于来自每个自然3D阵列结构单元的大量光反射，SFD可以吸收大部分入射光，因此其行为类似于黑体。此外，引入了一种简便的吡咯聚合方法以进一步改善SFD的光吸收并增强SFD的光热性能。这避免了昂贵的消耗制造过程。黑色PPy装饰的SFD在整个太阳光谱中显示99.3％的光吸收以及机械稳定性。在光热蒸发过程中，增加3D阵列结构SFD的蒸发面积可以有效减少对环境的热损失，因为SFD叶片固有的微孔结构和纤维素亲水性为水的运输提供了通道。基于PPy-SFD的蒸发器的蒸发速率可达到1.74 kg m^–2小时^–1在1个阳光下。因此，3D阵列结构PPy-SFD是高效光热蒸发器的可能候选者。

更新日期：2020-10-14

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