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<p>To enable open environment application of artificial photosynthesis, the direct utilization of environmental CO<sub>2</sub> via an oxygen-tolerant reductive procedure is necessary. Herein, we introduce an in situ growth strategy for fabricating two-dimensional heterojunctions between indium porphyrin metal-organic framework (In-MOF) and single-layer graphene oxide (GO). Upon illumination, the In-MOF/GO heterostructure facilitates a tandem CO<sub>2</sub> capture and photocatalytic reduction on its hydroxylated In-node, prioritizing the reduction of dilute CO<sub>2</sub> even in the presence of air-level O<sub>2</sub>. The In-MOF/GO heterostructure photocatalyst is integrated with a porous polytetrafluoroethylene (PTFE) membrane to construct a floatable artificial leaf. Through a triphase photocatalytic reaction, the floatable artificial leaf can remove aqueous contaminants from real water while efficiently reducing CO<sub>2</sub> at low concentrations (10%, approximately the CO<sub>2</sub> concentration in combustion flue gases) upon air-level O<sub>2</sub>. This study provides a scalable approach for the construction of photocatalytic devices for CO<sub>2</sub> conversion in open environments.</p>

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Floatable artificial leaf to couple oxygen-tolerant CO2 conversion with water purification

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年1月2日

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  • Zhiyong Zhang,
  • Yang Wang,
  • Yangen Xie,
  • Toru Tsukamoto,
  • Qi Zhao,
  • Qing Huang,
  • Xingmiao Huang,
  • Boyang Zhang,
  • Wenjing Song,
  • Chuncheng Chen,
  • Hua Sheng,
  • Jincai Zhao

摘要

To enable open environment application of artificial photosynthesis, the direct utilization of environmental CO2 via an oxygen-tolerant reductive procedure is necessary. Herein, we introduce an in situ growth strategy for fabricating two-dimensional heterojunctions between indium porphyrin metal-organic framework (In-MOF) and single-layer graphene oxide (GO). Upon illumination, the In-MOF/GO heterostructure facilitates a tandem CO2 capture and photocatalytic reduction on its hydroxylated In-node, prioritizing the reduction of dilute CO2 even in the presence of air-level O2. The In-MOF/GO heterostructure photocatalyst is integrated with a porous polytetrafluoroethylene (PTFE) membrane to construct a floatable artificial leaf. Through a triphase photocatalytic reaction, the floatable artificial leaf can remove aqueous contaminants from real water while efficiently reducing CO2 at low concentrations (10%, approximately the CO2 concentration in combustion flue gases) upon air-level O2. This study provides a scalable approach for the construction of photocatalytic devices for CO2 conversion in open environments.