Graphene Oxide-Arginine Composites: Efficient Dual Function Materials for Integrated CO₂ Capture and Conversion

Area of Science:

• Materials Science
• Chemical Engineering
• Environmental Science

Background:

• Carbon dioxide (CO2) capture and utilization are critical for mitigating climate change.
• Existing methods often lack efficiency or require harsh conditions.
• Developing integrated systems for CO2 capture and conversion is a key research area.

Purpose of the Study:

• To develop a dual-function organic composite for on-demand CO2 capture and utilization.
• To investigate the material's capability for capturing CO2 from diverse sources, including direct air capture.
• To elucidate the mechanism of CO2 capture and its subsequent conversion into cyclic carbonates.

Main Methods:

• Covalent derivatization of graphene oxide (GO) with arginine.
• Chemisorption of CO2 from flue gas and direct air capture streams.
• Spectroscopic, thermal, and computational analyses to understand the integrated CO2 capture and conversion (ICCC) strategy.

Main Results:

• A readily accessible dual-function organic composite was successfully synthesized.
• The material demonstrated effective CO2 capture via chemisorption from both high-purity and low-concentration sources.
• The composite facilitated the chemical activation of captured CO2 for incorporation into cyclic carbonates.

Conclusions:

• The developed arginine-functionalized graphene oxide composite offers an efficient and versatile platform for integrated CO2 capture and conversion.
• The material's dual functionality enables on-demand CO2 management.
• The mechanistic understanding provides a foundation for designing advanced CO2 capture and utilization technologies.