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<p>This work aims to enhance TiNT’s light absorption capacity and PEC hydrogen production efficiency through simultaneous modification with organic compounds and Ag nanoparticles. By comparing three organics (dopamine, ascorbic acid, benzoic acid), we found that π-π stacking between aromatic groups on TiNT and hydroxyl-bearing molecules enhances dopamine deposition, which is critical for subsequent Ag nanoparticle modification. Co-modification with dopamine and Ag nanoparticles (TiNT-Dopamine-Ag) enhances both visible light absorption and PEC activity. Compared to TiNT directly modified with Ag (TiNT-Ag), TiNT-Dopamine-Ag with equivalent Ag concentration exhibited a 3.2-fold higher hydrogen production efficiency.</p>

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Comparative Study on PEC Hydrogen Production Using Trititanate Nanotubes Co-modified with Hydroxyl-Containing Organics and Ag Nanoparticles

  • 期刊论文

  • 发表日期：

    2025年12月2日

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  • Xiaorong Cheng,
  • Eric Amigues,
  • Yuxuan Han,
  • Qingran Chang,
  • Tianyang Yuan,
  • Huanyu Shen,
  • Graham Dawson

摘要

This work aims to enhance TiNT’s light absorption capacity and PEC hydrogen production efficiency through simultaneous modification with organic compounds and Ag nanoparticles. By comparing three organics (dopamine, ascorbic acid, benzoic acid), we found that π-π stacking between aromatic groups on TiNT and hydroxyl-bearing molecules enhances dopamine deposition, which is critical for subsequent Ag nanoparticle modification. Co-modification with dopamine and Ag nanoparticles (TiNT-Dopamine-Ag) enhances both visible light absorption and PEC activity. Compared to TiNT directly modified with Ag (TiNT-Ag), TiNT-Dopamine-Ag with equivalent Ag concentration exhibited a 3.2-fold higher hydrogen production efficiency.