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The Role of Zn-Hf Site Proximity and Oxygen Vacancies for Methanol Formation Over ZnHfO<sub>x</sub> Catalysts Under CO<sub>2</sub> Hydrogenation Conditions.

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Circular and athermal atmospheric CO<sub>2</sub> capture by food waste-derived amyloid sorbents.

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Amine-Functionalized Amyloid Aerogels for CO2 Capture.

Zhou Dong1, Mohammad Peydayesh1, Felix Donat2

  • 1Department of Health Sciences & Technology, ETH Zurich, Schmelzbergstrasse 9, 8092, Zurich, Switzerland.

Chemsuschem
|September 8, 2023
PubMed
Summary

Researchers developed novel protein-based aerogels from food proteins for carbon dioxide (CO2) capture. These amyloid fibril-templated materials show promising CO2 sorption, offering a new avenue for direct air capture technologies.

Keywords:
Amyloid fibrilsCO2 captureMicroporous materialsaerogelbiomass

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Area of Science:

  • Materials Science
  • Environmental Science
  • Biotechnology

Background:

  • Excessive carbon dioxide (CO2) emissions pose a significant threat due to climate change.
  • Reducing CO2 emissions alone is insufficient; direct air capture (DAC) technologies are essential.
  • Developing efficient and sustainable adsorbents is crucial for DAC.

Purpose of the Study:

  • To develop novel aminosilane-modified amyloid fibril-templated aerogels for CO2 capture.
  • To investigate the impact of aminosilane modification and amyloid fibril type on CO2 sorption properties.
  • To demonstrate the potential of protein-based materials for direct air capture.

Main Methods:

  • Utilized amyloid fibrils from food proteins as adsorbent supports.
  • Created aminosilane-modified amyloid fibril-templated aerogels.
  • Tested CO2 sorption capacities under varying conditions and material compositions.

Main Results:

  • CO2 sorption properties were dependent on aminosilane mixing ratio and amyloid fibril type.
  • Amine-functionalized β-lactoglobulin (BLG) fibril-templated aerogels exhibited high CO2 adsorption (51.52 mg/g at 1 bar).
  • Chitosan-BLG hybrid aerogels showed superior CO2 adsorption compared to pure chitosan.

Conclusions:

  • Amyloid fibril-templated hybrid materials offer a viable strategy for protein-based CO2 adsorbents.
  • This study provides a proof-of-concept for advanced materials in CO2 capture.
  • The developed aerogels show potential for practical applications in direct air capture.