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<p>Photocatalytic hydrogen evolution and photothermal desalination have traditionally been developed as separate technologies; however, their integration through rational molecular design remains unexplored. Here, a photosensitive organic semiconductor BT-BO-L4F was synthesized by extending the <i>π</i>-conjugated structure of the end groups in BO-L4F. It exhibits a narrower bandgap and better electron mobility than BO-L4F, offering higher photothermal and photocatalytic potential. By integration with PM6 to form a donor-acceptor heterojunction, dual applications of efficient photocatalytic hydrogen production and photothermal seawater desalination can be achieved. The prepared PM6:BT-BO-L4F system achieved a photocatalytic sacrificial-type hydrogen evolution rate of 86.6 mmol h<sup>−1</sup> m<sup>−2</sup> as well as water evaporation rate of 1.66 kg m<sup>−2</sup> h<sup>−1</sup> with 93.2% conversion efficiency, significantly outperforming the PM6:BO-L4F system. This work introduced a molecular-level optimization strategy for synergistically enhancing photocatalytic and photothermal performance, thereby establishing a new paradigm for efficient co-production of hydrogen energy and clean water.</p>

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Synergistically enhancing photocatalytic and photothermal effects at the fiber-liquid interface through terminal-extended architectures

  • 期刊论文

  • 发表日期：

    2026年3月30日

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  • Jingshuai Zhu,
  • Jianming Chen,
  • Mengmeng Han,
  • Zishuo Zhang,
  • Fangqing Fan,
  • Jiaxin Zheng,
  • Shiguo Chen,
  • Yuanfeng Wang,
  • Xungai Wang

摘要

Photocatalytic hydrogen evolution and photothermal desalination have traditionally been developed as separate technologies; however, their integration through rational molecular design remains unexplored. Here, a photosensitive organic semiconductor BT-BO-L4F was synthesized by extending the π-conjugated structure of the end groups in BO-L4F. It exhibits a narrower bandgap and better electron mobility than BO-L4F, offering higher photothermal and photocatalytic potential. By integration with PM6 to form a donor-acceptor heterojunction, dual applications of efficient photocatalytic hydrogen production and photothermal seawater desalination can be achieved. The prepared PM6:BT-BO-L4F system achieved a photocatalytic sacrificial-type hydrogen evolution rate of 86.6 mmol h−1 m−2 as well as water evaporation rate of 1.66 kg m−2 h−1 with 93.2% conversion efficiency, significantly outperforming the PM6:BO-L4F system. This work introduced a molecular-level optimization strategy for synergistically enhancing photocatalytic and photothermal performance, thereby establishing a new paradigm for efficient co-production of hydrogen energy and clean water.