Solar steam generation (SSG) is regarded as a promising technique due to its potential in seawater desalination. Photothermal conversion materials derived from biomass are good evaporators for SSG because of their sustainability and high efficiency. Herein, 3D-cylindrical-structured composite materials based on gourd flesh and polypyrrole (GPPY) are designed and used for high efficient SSG. The polypyrrole layer is deposited on the gourd flesh to provide broad optical absorption ability and high photothermal conversion efficiency. In addition, gourd flesh with porous structure can act as thermal insulators, confine the generated heat within the evaporative surface, and facilitate the efficient transport of water to the photothermally active area. Based on these characteristics of the composite, the evaporator made of GPPY can achieve a high evaporation rate of (1.63 kg m⁻² h⁻¹), and a superior photothermal conversion efficiency 95.8% under 1 solar irradiation (1 kW m⁻²). The GPPY can be expected to be a practical photothermal conversion material for commercial SSG based on its high efficiency and sustainability.

中文翻译：

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通过葫芦肉模板化聚吡咯复合材料实现高效太阳能蒸汽发电和海水淡化

太阳能蒸汽发电（SSG）因其在海水淡化方面的潜力而被认为是一种有前途的技术。来自生物质的光热转换材料因其可持续性和高效率而成为 SSG 的良好蒸发器。在此，设计并使用基于葫芦肉和聚吡咯（GPPY）的3D圆柱结构复合材料来实现高效SSG。将聚吡咯层沉积在葫芦肉上，提供广泛的光吸收能力和高光热转换效率。此外，具有多孔结构的葫芦肉可以充当隔热体，将产生的热量限制在蒸发表面内，并促进水有效输送到光热活性区域。基于复合材料的这些特性，由GPPY制成的蒸发器可以实现高蒸发速率（1.63 kg m ^-2  h ^{-1 ），并且在1次太阳照射（1 kW m -2}）下光热转换效率高达95.8% 。基于其高效率和可持续性，GPPY有望成为商业SSG的实用光热转换材料。