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<p>The photocatalytic reduction of CO<sub>2</sub> for the production of solar fuels without sacrificing agents is an environmentally friendly and important process, with the development of high-performance photocatalysts being a key focus. An inorganic/organic semiconducting pair with an S-scheme mechanism has been incorporated in a hybrid fiber morphology designed specifically for an S-scheme heterojunction. Specifically, polydopamine (PDA) nanoparticles were synthesized within the walls of TiO<sub>2</sub> nanofibers through <i>in situ</i> self-polymerization of dopamine hydrochloride. The TiO<sub>2</sub>@PDA composite photocatalyst with 1.0% PDA decoration exhibited the highest CO yield of 19.15 µmol·h<sup>−1</sup>·g·<sup>−1</sup>, which was 2.6 times greater than that of pure TiO<sub>2</sub> (7.25 µmol·h<sup>−1</sup>·g·<sup>−1</sup>). By combining PDA and TiO<sub>2</sub> nanofibers arranged in an S-scheme heterojunction can be attributed to the improved light absorption and the effective charge carrier separation and transfer. Consequently, this research introduces a novel approach for developing inorganic/organic S-scheme heterojunctions with a fiber morphology to enhance CO<sub>2</sub> photoreduction efficiency.</p>

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In situ-illuminated XPS Investigation of S-Scheme Inorganic/Organic Hybrid Nanofiber Photocatalysts for Efficient CO2 Photoreduction

  • 期刊论文

  • 发表日期：

    2025年9月9日

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  • Zicong Wang,
  • Xi Li,
  • Yunlong Liu,
  • Xiangsi Wu,
  • Xianwen Wu,
  • Wu Xia

摘要

The photocatalytic reduction of CO2 for the production of solar fuels without sacrificing agents is an environmentally friendly and important process, with the development of high-performance photocatalysts being a key focus. An inorganic/organic semiconducting pair with an S-scheme mechanism has been incorporated in a hybrid fiber morphology designed specifically for an S-scheme heterojunction. Specifically, polydopamine (PDA) nanoparticles were synthesized within the walls of TiO2 nanofibers through in situ self-polymerization of dopamine hydrochloride. The TiO2@PDA composite photocatalyst with 1.0% PDA decoration exhibited the highest CO yield of 19.15 µmol·h−1·g·−1, which was 2.6 times greater than that of pure TiO2 (7.25 µmol·h−1·g·−1). By combining PDA and TiO2 nanofibers arranged in an S-scheme heterojunction can be attributed to the improved light absorption and the effective charge carrier separation and transfer. Consequently, this research introduces a novel approach for developing inorganic/organic S-scheme heterojunctions with a fiber morphology to enhance CO2 photoreduction efficiency.