Related Experiment Video
Updated: Jul 17, 2025
07:08
CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light
Published on: June 12, 2019
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Light-Driven CO2 Reduction with a Surface-Displayed Enzyme Cascade-C3N4 Hybrid.
Yukai Sheng1, Fang Guo1, Bingchen Guo1
1Institute of Biochemical Engineering, Key Laboratory of Medical Molecule Science and Pharmaceutical Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, China.
ACS Synthetic Biology
|August 31, 2023
Summary
This study introduces a novel semiconductor biohybrid system for efficient carbon dioxide (CO2) conversion to methanol using light. This sustainable approach integrates enzymes with a biocompatible material, paving the way for CO2-to-biomass conversion.
Area of Science:
- Biotechnology
- Materials Science
- Environmental Science
Background:
- Efficient carbon dioxide (CO2) conversion is crucial for climate change mitigation.
- Existing methods using enzyme cascades or cytotoxic semiconductors face challenges.
- A need exists for straightforward, biocompatible semiconductor biohybrid systems for CO2 utilization.
Purpose of the Study:
- To develop a novel enzyme-photocoupled catalytic system for CO2 conversion.
- To create a semiconductor-enzyme-cell hybrid system for in situ CO2-to-biomass conversion.
- To establish a sustainable and cost-effective method for solar-driven CO2 utilization.
Main Methods:
- Utilized visible-light-responsive, biocompatible C3N4 porous nanosheets.
- Decorated C3N4 with formate dehydrogenase, formaldehyde dehydrogenase, and alcohol dehydrogenase.
- Displayed enzymes on Komagataella phaffii and coupled with C3N4 to form a hybrid system.
Main Results:
- Achieved remarkable CO2-to-methanol conversion efficiency with 2.48% apparent quantum efficiency.
- Demonstrated a methanol production rate of 4.07 mg/(L·h) without electron mediators.
- Successfully converted produced methanol into biomass within the microbial cell.
Conclusions:
- Presents a sustainable, environmentally friendly, and cost-effective enzyme-photocoupled biocatalytic system.
- Highlights the potential of semiconductor-enzyme-cell hybrids for efficient solar-driven CO2 conversion.
- Offers a promising pathway for addressing the climate crisis through CO2 utilization.
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