Highly Enhanced Gas Sorption Capacities of N-Doped Porous Carbon Spheres by Hot NH3 and CO2 Treatments
- Authors
- Kim, Hee Soo; Kang, Mm Seok; Yoo, Won Cheol
- Issue Date
- Dec-2015
- Publisher
- AMER CHEMICAL SOC
- Keywords
- METAL-ORGANIC FRAMEWORK; RESORCINOL-FORMALDEHYDE RESIN; C-13 NMR CHARACTERIZATION; CARBIDE-DERIVED; CARBONS; HIGH-SURFACE-AREA; HYDROGEN STORAGE; ACTIVATED CARBON; PORE-SIZE; ADSORPTION PROPERTIES; MESOPOROUS CARBONS
- Citation
- JOURNAL OF PHYSICAL CHEMISTRY C, v.119, no.51, pp 28512 - 28522
- Pages
- 11
- Indexed
- SCI
SCIE
SCOPUS
- Journal Title
- JOURNAL OF PHYSICAL CHEMISTRY C
- Volume
- 119
- Number
- 51
- Start Page
- 28512
- End Page
- 28522
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/16128
- DOI
- 10.1021/acs.jpcc.5b10552
- ISSN
- 1932-7447
1932-7455
- Abstract
- Highly enhanced CO2 and H-2 adsorption properties were achieved with a series of phenolic resin-based carbon spheres (resorcinol formaldehyde carbon (RFC), and phenol formaldehyde carbon (PFC)) by carbonization of RF and PF polymer (RFP and PIP) spheres synthesized via sol-gel reaction and Subsequent activation with hot CO2 or NH3 treatment. Monodisperse and size-tunable (100-600 nm) RFC and PFC spheres had intrinsic nitrogen contents' (ca. 1.5 wt %), which are attributed to the synthesis conditions that utilized NH3 as a basic catalyst as well as nitrogen precursor. A series of CO2-activated and N-doped RFC and PFC spheres Showed almost perfect correlation (R-2 = A3.99) between CO2, adsorption capacities and accumulated pore volumes of fine micropores (ultramicropore <1 nm) obtained using the nonlocal density functional theory (NLDFT) model. Interestingly, NH3 activation served not only as an effective method for heteroatom doping (i.e., nitrogen) into the carbon framework but also as an excellent activation process to fine-tune the surface area and pore size distribution (PSD). Increased nitrogen doping levels up to ca.. 2.8 wt % for NH3-actiyated RFC spheres showed superior CO2 adsorption capacities of 4.54 (1 bar) and 7.14 mmol g(-1) (1 bar) at 298 and 273 K, respectively. Compared to CO2-activated RFC spheres with similar ultramicropore volume presenting CO2 uptakes of 4.41 (1 bar) and 6.86 mmol g(-1) (1 bar) at 298 and 273 K, respectively, NH3-activated nitrogen-enriched RFC Was found to have elevated chemisorption ability. Moreover, prolonged activation of RFC and PFC spheres provided ultrahigh surface areas, one of which reached 4079 m(2)g(-1) with an unprecedented superb 142 uptake capacity of 3.26 wt % at 77 K (1 bar), representing One of the best H-2 storage media among carbonaceous materials and metal organic frameworks (MOFs).
- Files in This Item
-
Go to Link
- Appears in
Collections - COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY > DEPARTMENT OF CHEMICAL AND MOLECULAR ENGINEERING > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.