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A new insight into the SO2 adsorption behavior of oxidized carbon materials using model adsorbents and DFT calculations.
- Source :
- Physical Chemistry Chemical Physics (PCCP); 5/14/2019, Vol. 21 Issue 18, p9181-9188, 8p
- Publication Year :
- 2019
-
Abstract
- Heteroatom-doped carbon materials have been proven to be very effective for gas adsorption. Herein, edge-carboxylated graphene nanoplatelets with gradient oxygen contents and consistent pore structures were used as model adsorbents to independently determine the effects of the oxygen functionalization of carbon materials on the SO<subscript>2</subscript> adsorption. The OGnPs were obtained by employing a simple ball milling method using dry ice by which an oxygen content as high as 14.06 wt% could be achieved, resulting in a 20 times increase in SO<subscript>2</subscript> adsorption capacity as compared to that of oxygen-free graphene nanoplatelets. Both the experiments and density functional theory calculations demonstrated that the enhanced SO<subscript>2</subscript> adsorption on the oxygenated carbon surface had a physisorption nature, which provided new insights into the development of advanced carbon materials with heteroatom doping for gas molecule adsorption. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14639076
- Volume :
- 21
- Issue :
- 18
- Database :
- Complementary Index
- Journal :
- Physical Chemistry Chemical Physics (PCCP)
- Publication Type :
- Academic Journal
- Accession number :
- 136338930
- Full Text :
- https://doi.org/10.1039/c8cp07782g