Interrogating the Carbon and Oxygen K-edge NEXAFS of a CO2-dosed Hyperbranched Aminosilica

Published

December 19, 2014

Author(s)

Laura Espinal, Martin L. Green, Dean M. DeLongchamp, Watcharop Chaikittisilp, Jarod C. Horn, Miles Sakwa-Novak, Cherno Jaye, Daniel A. Fischer, Nicholas Brunelli, Christopher Jones

Abstract

Near edge x-ray absorption fine structure (NEXAFS) spectroscopy was used to study the adsorption of CO2 in a hyperbranched aminosilica (HAS) compound, a porous solid state material with great potential for carbon capture applications. After dosing a pristine (annealed) HAS sample with CO2, the NEXAFS spectrum presented a new π* resonance at 289.9 eV, which could be attributed to the formation of a C=O (carbonyl) bond. Our results suggest a carbamate bonding mechanism for the chemical adsorption of CO2 by the HAS.

Citation

Journal of Physical Chemistry Letters

Volume

6

Issue

1

Pub Type

Journals

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DOI Link

Keywords

hyperbranched aminosilica, NEXAFS, carbon capture materials, CO2 capture materials, carbon mitigation

Citation

Espinal, L. , Green, M. , DeLongchamp, D. , , W. , Horn, J. , Sakwa-Novak, M. , Jaye, C. , Fischer, D. , Brunelli, N. and Jones, C. (2014), Interrogating the Carbon and Oxygen K-edge NEXAFS of a CO2-dosed Hyperbranched Aminosilica, Journal of Physical Chemistry Letters, [online], https://doi.org/10.1021/jz502483v (Accessed October 17, 2025)