A Reversed Photosynthesis-like Process for Light-Triggered CO₂ Capture, Release, and Conversion

Area of Science:

• Materials Science
• Environmental Chemistry
• Photochemistry

Background:

• Current CO2 capture materials face challenges with high regeneration energy costs and secondary CO2 contamination.
• Efficient and sustainable methods for carbon dioxide (CO2) capture and utilization are crucial for climate governance.

Purpose of the Study:

• To develop a novel material and process for CO2 capture with energy-efficient regeneration.
• To investigate a reversed photosynthesis-like mechanism for CO2 absorption and release.

Main Methods:

• A novel material was synthesized for CO2 capture.
• A reversed photosynthesis-like process was employed, with CO2 absorption in darkness and release under light.
• The captured CO2 was further converted into a stable compound using specific catalysts.

Main Results:

• The material demonstrated a CO2 capture capacity of 9.6 wt.% for its active component.
• The CO2 capture and release process is repeatable at room temperature.
• Light-induced regeneration proved convenient and cost-effective, avoiding secondary CO2 contamination.

Conclusions:

• The proposed reversed photosynthesis-like process offers a sustainable and efficient alternative for CO2 capture and regeneration.
• This technology has the potential to supplement natural photosynthesis and contribute to climate change mitigation.
• The conversion of released CO2 into stable compounds enhances its environmental applicability.