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

Zhiyong Zhang, Yang Wang, Yangen Xie, Toru Tsukamoto, Qi Zhao, Qing Huang, Xingmiao Huang, Boyang Zhang, Wenjing Song, Chuncheng Chen, Hua Sheng () and Jincai Zhao
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Zhiyong Zhang: Beijing National Laboratory for Molecular Sciences
Yang Wang: University of Chinese Academy of Sciences
Yangen Xie: Beijing National Laboratory for Molecular Sciences
Toru Tsukamoto: Beijing National Laboratory for Molecular Sciences
Qi Zhao: Beijing National Laboratory for Molecular Sciences
Qing Huang: Beijing National Laboratory for Molecular Sciences
Xingmiao Huang: Beijing National Laboratory for Molecular Sciences
Boyang Zhang: Beijing National Laboratory for Molecular Sciences
Wenjing Song: Beijing National Laboratory for Molecular Sciences
Chuncheng Chen: Beijing National Laboratory for Molecular Sciences
Hua Sheng: Beijing National Laboratory for Molecular Sciences
Jincai Zhao: Beijing National Laboratory for Molecular Sciences

Nature Communications, 2025, vol. 16, issue 1, 1-10

Abstract: Abstract 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.

Date: 2025
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DOI: 10.1038/s41467-024-55753-2

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