Congress2 min read

Core-shell microgel@MOF colloids for selective CO2 capture

Abstract

EDElise Deniau
Core-shell microgel@MOF colloids for selective CO2 capture

As reported by the intergovernmental panel on climate change, there is a direct link between the increased atmospheric CO2 concentration, exceeding 400 ppm, and the global warming causing significant environmental impacts [1]. To mitigate this issue, CO2 capture and storage is considered as vital solution. For that purpose, the use of porous adsorbent with high selectivity and important CO2 adsorption capabilities is mandatory.

In this context we aim to develop hybrid core-shell microgel@MOF colloids capable of selectively capturing CO2 with a high adsorption capacity. Precisely, microporous core of poly(pyrazine) microgels with high surface area and tailored porosity will serve as sink for increasing the CO2 capacity while an ultra-microporous MOF shell will serve as molecular sieving layer for selective adsorption of CO2.

Here we describe the synthesis and characterization of waterborne poly(pyrazine) (PPyr) microgel colloids by miniemulsion polymerization [2]. Pyrazine moiety was chosen to create anchors for the synthesis of microporous fluorinated NbOFFIVE-1-Ni MOF shell. NbOFFIVE-1Ni is highlighted for its exceptional CO2 adsorption selectivity combining with an excellent chemical water stability [3]. The resulting core-shell colloids are characterized using Dynamic Light Scattering (DLS), Transmission Electron Microscopy (TEM) and Powder X-Ray Diffraction (PXRD). We show how the chemical and the internal structures of the microgels play a major role for maximizing the interface with the MOF shell. CO2 adsorption performances obtained by Brunauer-Emmett-Teller (BET) analysis will also be presented.

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References

  1. IPCC, 2022: Climate Change 2022: Impacts, Adaptation, and Vulnerability. H.-O. Pörtner, D.C. Roberts, M. Tignor, E.S. Poloczanska, K. Mintenbeck, A. Alegría, M. Craig, S. Langsdorf, S. Löschke, V. Möller, A. Okem, B. Rama (eds.)]. Cambridge University Press. Cambridge University Press, Cambridge, UK and New York, NY, USA, 3056 pp.

  2. E. Decompte, V. Lobaz, M. Monperrus, E. Deniau, M. Save ACS Applied Polymer Materials 2020, 8, 3543.

  3. Cadiau, K. Adil, P.M. Bhatt, Y. Belmabkhout, M. Eddaoudi Science, 2016, 353, 137.