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Area of Science:

  • Materials Science
  • Photocatalysis
  • Environmental Chemistry

Background:

  • Artificial photosynthesis requires efficient CO2 utilization in open environments.
  • Oxygen-tolerant reductive procedures are crucial for practical applications.
  • Developing stable and efficient photocatalysts for CO2 reduction remains a challenge.

Purpose of the Study:

  • To develop a two-dimensional heterojunction photocatalyst for direct CO2 utilization.
  • To engineer an oxygen-tolerant system for photocatalytic CO2 reduction.
  • To create a floatable artificial leaf device for simultaneous water purification and CO2 conversion.

Main Methods:

  • In situ growth of indium porphyrin metal-organic framework (In-MOF) and graphene oxide (GO) heterojunctions.
  • Fabrication of a floatable artificial leaf using a porous polytetrafluoroethylene (PTFE) membrane.
  • Testing the photocatalytic performance in a triphase reaction system under illumination.

Main Results:

  • The In-MOF/GO heterostructure demonstrated efficient tandem CO2 capture and photocatalytic reduction.
  • The system effectively reduced dilute CO2 in the presence of air-level O2.
  • The floatable artificial leaf successfully removed aqueous contaminants and reduced CO2 from real water.

Conclusions:

  • The developed In-MOF/GO heterojunction is a promising photocatalyst for CO2 conversion.
  • The floatable artificial leaf offers a scalable and practical approach for environmental applications.
  • This technology enables CO2 utilization in open environments, addressing key challenges in artificial photosynthesis.