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<p>With the continuous development of technology and economy, human exploitation of water resources has gradually intensified, and the problems of resource shortage and industrial pollution have become increasingly serious. The problem of water scarcity has an increasingly serious impact on human production and life. Solar-driven interfacial evaporation desalination has emerged as an effective solution to address this challenge. In this study, a PVA/B-TiO<sub>2</sub> composite hydrogel is developed using polyvinyl alcohol (PVA) as the matrix. The results demonstrate that the incorporation of black TiO<sub>2</sub> significantly enhances the photothermal conversion efficiency and evaporation rate of the composite hydrogel. Combined with the excellent water collection, storage, and transport capabilities of the PVA hydrogel, the PVA/B-TiO<sub>2</sub> composite hydrogel achieves an evaporation rate of 1.60 kg/(m<sup>2</sup>·h) under 1 sun illumination. This study provides valuable theoretical insights for the design of interfacial evaporation materials.</p>

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High-Performance PVA/B-TiO2 Composite Hydrogel for Solar Interfacial Evaporation

  • 期刊论文

  • 发表日期：

    2026年4月16日

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  • Jiayu Chu,
  • Xiangxiong Zhang,
  • Shengyuan Zhang,
  • Shuning Li,
  • Lejun Feng,
  • Hao Feng,
  • Huijin Qian

摘要

With the continuous development of technology and economy, human exploitation of water resources has gradually intensified, and the problems of resource shortage and industrial pollution have become increasingly serious. The problem of water scarcity has an increasingly serious impact on human production and life. Solar-driven interfacial evaporation desalination has emerged as an effective solution to address this challenge. In this study, a PVA/B-TiO2 composite hydrogel is developed using polyvinyl alcohol (PVA) as the matrix. The results demonstrate that the incorporation of black TiO2 significantly enhances the photothermal conversion efficiency and evaporation rate of the composite hydrogel. Combined with the excellent water collection, storage, and transport capabilities of the PVA hydrogel, the PVA/B-TiO2 composite hydrogel achieves an evaporation rate of 1.60 kg/(m2·h) under 1 sun illumination. This study provides valuable theoretical insights for the design of interfacial evaporation materials.