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<p>Metal–organic frameworks (MOFs) show great potential in photocatalytic CO<sub>2</sub> reduction, but their performance is limited by poor light absorption and rapid electron–hole recombination. To address this, a 2D/2D Z-scheme heterostructure (Ti-BPC@ZIS, Ti-2,2′-Bipyridine-4,4′-dicarboxylic acid@ZnIn<sub>2</sub>S<sub>4</sub>) was constructed by integrating a titanium-based MOF (Ti-BPC) with ZnIn<sub>2</sub>S<sub>4</sub> (ZIS) nanosheets. The heterojunction significantly enhanced visible-light absorption and charge separation, which is contributed Z-scheme structure and pyridine-N–Zn coordination at the interface. Under visible-light irradiation, Ti-BPC@ZIS achieved a CO yield of 3086&#xa0;μmol/g in 4&#xa0;h, which is 197.8 times higher than pristine Ti-BPC and 16.9 times higher than pure ZIS. These results highlight the effectiveness of 2D/2D Z-scheme design in improving MOF-based photocatalysts for solar fuel generation.</p> Graphical abstract <p></p>

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2D/2D Z-scheme heterostructure of titanium-based metal–organic framework/ZnIn2S4 for photocatalytic solar fuel evolution

  • 期刊论文

  • 发表日期：

    2025年9月6日

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  • Yeming Liu,
  • Heng Rao,
  • Ping She,
  • Jun-Sheng Qin

摘要

Metal–organic frameworks (MOFs) show great potential in photocatalytic CO2 reduction, but their performance is limited by poor light absorption and rapid electron–hole recombination. To address this, a 2D/2D Z-scheme heterostructure (Ti-BPC@ZIS, Ti-2,2′-Bipyridine-4,4′-dicarboxylic acid@ZnIn2S4) was constructed by integrating a titanium-based MOF (Ti-BPC) with ZnIn2S4 (ZIS) nanosheets. The heterojunction significantly enhanced visible-light absorption and charge separation, which is contributed Z-scheme structure and pyridine-N–Zn coordination at the interface. Under visible-light irradiation, Ti-BPC@ZIS achieved a CO yield of 3086 μmol/g in 4 h, which is 197.8 times higher than pristine Ti-BPC and 16.9 times higher than pure ZIS. These results highlight the effectiveness of 2D/2D Z-scheme design in improving MOF-based photocatalysts for solar fuel generation.

Graphical abstract