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Enhancing CO2 capture through innovating monolithic graphene oxide frameworks.

Ranjeet Kumar Jha1, Haripada Bhunia2, Soumen Basu1

  • 1School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Patiala, 147004, Punjab, India.

Environmental Research
|February 11, 2024
PubMed
Summary
This summary is machine-generated.

Engineered porous graphene oxide frameworks using KOH treatment significantly enhance CO2 capture. This novel adsorbent shows improved capacity and regenerability, offering a promising solution for post-combustion carbon capture.

Keywords:
CO(2) captureGraphene oxideKOH-TreatmentMonolithSelectivity

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Environmental Science

Background:

  • Development of advanced porous crystalline materials is crucial for effective carbon dioxide (CO2) capture.
  • Graphene oxide frameworks offer potential for CO2 adsorption applications.

Purpose of the Study:

  • To synthesize and characterize novel monolithic reduced graphene oxide-based adsorbents.
  • To evaluate the CO2 capture performance of KOH-treated graphene oxide frameworks.

Main Methods:

  • Synthesis of monolithic reduced graphene oxide (MGO) via self-assembly of graphene oxide (GO) and malic acid (MaA) at various ratios.
  • Modification of MGO 0.250 using KOH treatment with chloroacetic acid to create MGO 0.250_KOH.
  • Characterization using FT-IR, XRD, Raman, BET, SEM, HR-TEM, and XPS; CO2 capture assessment at 25 °C and 1 bar.

Main Results:

  • MGO 0.250_KOH exhibited enhanced CO2 capture capacity, increasing from 1.69 to 2.35 mmol g⁻¹.
  • Specific surface area increased from 287.93 to 419.75 m² g⁻¹ after KOH treatment.
  • High production yield (82.92%) and regenerability (98.80% at 100 °C) were achieved.

Conclusions:

  • KOH-treated monolithic reduced graphene oxide frameworks demonstrate superior CO2 adsorption performance.
  • These adsorbents are promising for post-combustion CO2 capture due to enhanced capacity and stability.
  • The synthesis strategy presents a viable pre-treatment technique for industrial applications.