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A new insight into the SO2 adsorption behavior of oxidized carbon materials using model adsorbents and DFT calculations

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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 SO2 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 SO2 adsorption capacity as compared to that of oxygen-free graphene nanoplatelets. Both the experiments and density functional theory calculations demonstrated that the enhanced SO2 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.

Graphical abstract: A new insight into the SO2 adsorption behavior of oxidized carbon materials using model adsorbents and DFT calculations

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Publication details

The article was received on 22 Dec 2018, accepted on 13 Mar 2019 and first published on 14 Mar 2019


Article type: Paper
DOI: 10.1039/C8CP07782G
Citation: Phys. Chem. Chem. Phys., 2019, Advance Article

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    A new insight into the SO2 adsorption behavior of oxidized carbon materials using model adsorbents and DFT calculations

    X. Pi, F. Sun, J. Gao, Z. Qu, A. Wang, Z. Qie, L. Wang and H. Liu, Phys. Chem. Chem. Phys., 2019, Advance Article , DOI: 10.1039/C8CP07782G

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