Reversible CO2 adsorption by an activated nitrogen doped graphene/polyaniline material
SCIE
SCOPUS
- Title
- Reversible CO2 adsorption by an activated nitrogen doped graphene/polyaniline material
- Authors
- Kingsley Christian Kemp; Vimlesh Chandra; SalehMuhammad; Saleh, M; Kim, KS
- Date Issued
- 2013-06-14
- Publisher
- IOP Publishing
- Abstract
- For effective adsorption of carbon dioxide (CO2), we investigate a porous N functionalized graphene adsorbent produced by the chemical activation of a reduced graphene oxide/polyaniline composite. The N-doped graphene composite is microporous with a maximum BET surface area of 1336 m(2) g(-1). It shows a highly reversible maximum CO2 storage capacity of 2.7 mmol g(-1) at 298 K and 1 atm (5.8 mmol g(-1) at 273 K and 1 atm). The N-doped graphene shows good stability during recycling with only an initial decrease of 10% (3-2 .7 mmol g(-1)) in adsorption capacity before attaining a cycling equilibrium. The adsorbance capacity is correlated with N content x pore volume or N content x surface area. Given that there is no proper correlation parameter, these factors can be used to increase the CO2 adsorption capacity of N-doped graphene materials for practical utility. The as synthesized material also displays selectivity towards CO2 adsorption compared to H-2, N-2, Ar or CH4. The as formed material shows that graphene can be uniformly N-doped using the presented synthetic method.
- Keywords
- X-RAY PHOTOELECTRON; GRAPHENE OXIDE; CHEMICAL ACTIVATION; CLIMATE-CHANGE; CARBON; CAPTURE; SPECTROSCOPY; ADSORBENTS; SHEETS; DEVICE
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/15460
- DOI
- 10.1088/0957-4484/24/23/235703
- ISSN
- 0957-4484
- Article Type
- Article
- Citation
- NANOTECHNOLOGY, vol. 24, no. 23, page. 235703 - 235703, 2013-06-14
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