Chemically Reversible CO2 Uptake by Dendrimer-Impregnated Metal-Organic Frameworks

Rebecca B. Goncalves, Carlos Cuadrado Collados, Christos D. Malliakas, Zhiwei Wang, Matthias Thommes*, Randall Q. Snurr*, Joseph T. Hupp*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Industrialization over the past two centuries has resulted in a continuous rise in global CO2 emissions. These emissions are changing ecosystems and livelihoods. Therefore, methods are needed to capture these emissions from point sources and possibly from our atmosphere. Though the amount of CO2 is rising, it is challenging to capture directly from air because its concentration in air is extremely low, 0.04%. In this study, amines installed inside metal-organic frameworks (MOFs) are investigated for the adsorption of CO2, including at low concentrations. The amines used are polyamidoamine dendrimers that contain many primary amines. Chemically reversible adsorption of CO2 via carbamate formation was observed, as was enhanced uptake of carbon dioxide, likely via dendrimer-amide-based physisorption. Limiting factors in this initial study are comparatively low dendrimer loadings and slow kinetics for carbon dioxide uptake and release, even at 80 °C.

Original languageEnglish (US)
Pages (from-to)9299-9309
Number of pages11
JournalLangmuir
Volume40
Issue number17
DOIs
StatePublished - Apr 30 2024

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Spectroscopy
  • General Materials Science
  • Surfaces and Interfaces
  • Electrochemistry

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