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Related Experiment Video

Updated: Apr 14, 2026

Author Spotlight: Standardizing the Development of Amine-Based Silica Composites as CO2 Adsorbents for Direct Air Capture
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Amine-Functionalized Activated Carbon Monoliths by 3D Printing for Direct Air Capture.

Johanna Fricke1,2, Zoltán Bacsik3, Christine Schütz2

  • 1Department of Chemistry Stockholm University Stockholm Sweden.

Global Challenges (Hoboken, NJ)
|April 13, 2026
PubMed
Summary

This study introduces a new 3D-printed activated carbon material for direct air capture (DAC) of CO2. The innovative sorbent shows promise for cost-effective climate change mitigation due to its efficient CO2 uptake and low energy requirements.

Keywords:
CO2 adsorptionactivated carbondirect air capturedirect ink writinggraphene oxidenanoporous

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Environmental Science

Background:

  • Direct air capture (DAC) is crucial for climate change mitigation but faces challenges with high energy demands and material costs.
  • Developing efficient and cost-effective sorbent materials is key to enabling large-scale DAC deployment.

Purpose of the Study:

  • To present a novel porous sorbent material for DAC applications.
  • To utilize 3D-printed activated carbon monoliths functionalized with aminosilane for enhanced CO2 capture.

Main Methods:

  • Fabrication of activated carbon monoliths using direct ink writing.
  • Functionalization of monoliths with 3-aminopropyltriethoxysilane (APTES) to introduce chemisorption sites.
  • Characterization using structural, chemical, and IR spectroscopy analyses.

Main Results:

  • Successful grafting of aminosilane onto the monolithic structure without compromising architecture.
  • Demonstrated enhanced CO2 uptake capacity (0.25 mmol g⁻¹ at 0.04 kPa) at atmospheric concentrations.
  • Confirmation of CO2 chemisorption as ammonium carbamate and low-temperature desorption (75°C).

Conclusions:

  • Aminosilane-functionalized activated carbon monoliths represent a promising, cost-effective, and scalable sorbent for DAC.
  • The developed material offers a low-energy solution for capturing CO2 from ambient air.
  • This work pioneers the use of aminosilane-functionalized activated carbon for DAC.