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<p>Fiber-based photothermal materials have attracted considerable attention for solar-driven desalination. However, conventional single-layer fabric evaporators suffer from significant heat dissipation and salt crystallization at the evaporation interface, which markedly reduces efficiency and long-term stability. Herein, we propose a rationally designed dual-layer evaporator, fabricated by integrally weaving commercial carbon fiber and natural cotton fiber into a monolithic fabric. This structure decouples the functions of light absorption and water transport: the upper carbon layer serves as the photothermal evaporation zone, while the underlying cotton layer ensures continuous water supply and mitigates salt accumulation. Such a configuration not only facilitates rapid water transfer but also effectively confines heat at the evaporation surface. As a result, the evaporator achieves a high evaporation rate of 1.34&#xa0;kg·m<sup>−2</sup>·h<sup>−1</sup> under 1&#xa0;kW·m<sup>−2</sup> solar irradiation, along with excellent salt tolerance and operational stability. This work provides a scalable and efficient approach for sustainable wastewater treatment, seawater desalination, and drinking water production.</p>

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Double-Layer Carbon Fiber-Based Fabric Evaporator for Efficient Desalination

  • 期刊论文

  • 发表日期：

    2026年2月11日

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  • Hong Ge,
  • Wenxiang Guo,
  • Haoran Qiao,
  • Kerun Hua,
  • Jiugang Li,
  • Wenbin Li,
  • Junzhi Ma

摘要

Fiber-based photothermal materials have attracted considerable attention for solar-driven desalination. However, conventional single-layer fabric evaporators suffer from significant heat dissipation and salt crystallization at the evaporation interface, which markedly reduces efficiency and long-term stability. Herein, we propose a rationally designed dual-layer evaporator, fabricated by integrally weaving commercial carbon fiber and natural cotton fiber into a monolithic fabric. This structure decouples the functions of light absorption and water transport: the upper carbon layer serves as the photothermal evaporation zone, while the underlying cotton layer ensures continuous water supply and mitigates salt accumulation. Such a configuration not only facilitates rapid water transfer but also effectively confines heat at the evaporation surface. As a result, the evaporator achieves a high evaporation rate of 1.34 kg·m−2·h−1 under 1 kW·m−2 solar irradiation, along with excellent salt tolerance and operational stability. This work provides a scalable and efficient approach for sustainable wastewater treatment, seawater desalination, and drinking water production.