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Nitrogen-vacancy engineered g-C3N4/carbonized wood for simultaneous hydrogen production and desalination
发布时间：2026-04-02
  • 发表刊物：
    Chemical Engineering Journal
  • 关键字：
    Photothermal–photocatalytic system, Solar steam generation, Photocatalytic H₂ production, Seawater splitting
  • 摘要：
    Photocatalytic water splitting enables direct solar-to‑hydrogen (H2) conversion. However, challenges remain, such as its reliance on pure water and poor utilization of both thermal energy and photons. Herein, we design a photothermal-photocatalytic system by integrating nitrogen-vacancy engineered g- C₃N₄ (NvCN) with carbonized wood (CW), enabling the simultaneous generation of freshwater and H₂ from seawater. In this system, seawater is continuously delivered via capillary wicking through the CW substrate to the carbonized surface, where it is vaporized by the photothermal effect and subsequently split into H₂ by NvCN through photocatalysis, while the unreacted vapor is condensed to produce fresh water. This unique system exhibits a water evaporation rate of 1.14 kg m−2 h−1 and a high H2 production rate of 23.01 mmol m−2 h−1, which is nearly 2 times higher than that of the conventional powder-suspension system (11.72 mmol m−2 h−1), while maintaining stable operation in various natural water sources, such as seawater, spring water. The improved photocatalytic performance is mainly attributed to the synergistic optimization of reaction thermodynamics, energy transfer, and mass transfer. Furthermore, optimizing the composition and structure of NvCN–CW facilitates efficient allocation of solar energy applied between photothermal evaporation and photocatalytic H2 evolution.
  • 第一作者：
    Risheng Duan
  • 通讯作者：
    Ning Qin,Pei Zhao
  • 全部作者：
    Ikram Ullah,Waqar Ahmad Qureshi
  • 论文类型：
    期刊论文
  • 论文编号：
    175742
  • 卷号：
    535
  • 页面范围：
    175742
  • DOI码：
    10.1016/j.cej.2026.175742
  • 是否译文：
    否
  • 发表时间：
    2026-04
  • 收录刊物：
    EI、SCI
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