Synthesis of N-doped microporous carbon via chemical activation of polyindole-modified graphene oxide sheets for selective carbon dioxide adsorption
SCIE
SCOPUS
- Title
- Synthesis of N-doped microporous carbon via chemical activation of polyindole-modified graphene oxide sheets for selective carbon dioxide adsorption
- Authors
- SalehMuhammad; Vimlesh Chandra; Kingsley Christian Kemp; Kemp, KC; Kim, KS
- Date Issued
- 2013-06-28
- Publisher
- IOP Publishing
- Abstract
- A polyindole-reduced graphene oxide (PIG) hybrid was synthesized by reducing graphene oxide sheets in the presence of polyindole. We have shown PIG as a material for capturing carbon dioxide (CO2). The PIG hybrid was chemically activated at temperatures of 400-800 degrees C, which resulted in nitrogen (N)-doped graphene sheets. The N-doped graphene sheets are microporous with an adsorption pore size of 0.6 nm for CO2 and show a maximum (Brunauer, Emmet and Teller) surface area of 936 m(2) g(-1). The hybrid activated at 600 degrees C (PIG6) possesses a surface area of 534 m(2) g(-1) and a micropore volume of 0.29 cm(3) g(-1). PIG6 shows a maximum CO2 adsorption capacity of 3.0 mmol g(-1) at 25 degrees C and 1 atm. This high CO2 uptake is due to the highly microporous character of the material and its N content. The material retains its original adsorption capacity on recycling even after 10 cycles (within experimental error). PIG6 also shows high adsorption selectivity ratios for CO2 over N-2, CH4 and H-2 of 23, 4 and 85 at 25 degrees C, respectively.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/27415
- DOI
- 10.1088/0957-4484/24/25/255702
- ISSN
- 0957-4484
- Article Type
- Article
- Citation
- NANOTECHNOLOGY, vol. 24, no. 25, page. 255702 - 255702, 2013-06-28
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