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<p>Solar-driven interfacial evaporation is a low-carbon, sustainable, and highly efficient technology for freshwater production, emerging as a promising solution to global freshwater scarcity. However, it remains a central challenge for current development of photothermal interfacial materials that are facile-to-fabricate, scalable, and highly efficient. In this study, we have fabricated a three-dimensional graphite-based paper fiber Janus membrane (3D-GPFJM) photothermal interfacial evaporator. This evaporator is characterized by its low cost and ease of preparation through a simple coating and folding process. It displays superior photothermal performance with an evaporation rate of 3.35&#xa0;kg&#xa0;m<sup>−2</sup>&#xa0;h<sup>−1</sup> and a photothermal conversion efficiency of 91.29% under a light intensity of 1&#xa0;kW&#xa0;m<sup>−2</sup>. The constructed evaporator has excellent evaporation performance, high salt resistance and structural stability, and is suitable for high concentrations of NaCl solution (3.5&#xa0;wt% and 10&#xa0;wt%) and seawater. It can also maintain excellent evaporation performance in real environment, demonstrating exceptional anti-salt crystallization capabilities. Therefore, the 3D-GPFJM offers a promising solution for solar-driven seawater desalination and high-salinity water treatment, with potential for application in sustainable water purification technologies.</p>

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3D graphite-based Janus membrane with dual-sided evaporation for high-efficiency solar-driven water purification

  • 期刊论文

  • 发表日期：

    2025年6月23日

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  • Zhuo Liu,
  • Xiahui Liu,
  • Yuliang Zhang,
  • Ting Shu,
  • Xinhao Yan,
  • Tao Liu,
  • Xiaobo Chen

摘要

Solar-driven interfacial evaporation is a low-carbon, sustainable, and highly efficient technology for freshwater production, emerging as a promising solution to global freshwater scarcity. However, it remains a central challenge for current development of photothermal interfacial materials that are facile-to-fabricate, scalable, and highly efficient. In this study, we have fabricated a three-dimensional graphite-based paper fiber Janus membrane (3D-GPFJM) photothermal interfacial evaporator. This evaporator is characterized by its low cost and ease of preparation through a simple coating and folding process. It displays superior photothermal performance with an evaporation rate of 3.35 kg m−2 h−1 and a photothermal conversion efficiency of 91.29% under a light intensity of 1 kW m−2. The constructed evaporator has excellent evaporation performance, high salt resistance and structural stability, and is suitable for high concentrations of NaCl solution (3.5 wt% and 10 wt%) and seawater. It can also maintain excellent evaporation performance in real environment, demonstrating exceptional anti-salt crystallization capabilities. Therefore, the 3D-GPFJM offers a promising solution for solar-driven seawater desalination and high-salinity water treatment, with potential for application in sustainable water purification technologies.