Abstract
Graphene oxide (GO) was prepared by a modified Hummers' method. GO was modified using a simple CO2 pressure swing technique to obtain exfoliated GO. The microcrystalline structures and morphologies were characterized using the X-ray diffraction and scanning electron microscope/transmission electron microscope measurements. The textural properties were investigated by N2 (77 K) adsorption/desorption isotherms. CO2 (298 K, 30 bar) and H2 (298 K, 100 bar) adsorption experiments were conducted to investigate their adsorption behaviors. The results indicated that the best sample had a specific surface area of 547 m2/g and total pore volume of 2.468 cm3/g. According to the results, CO2 pressure swing method can be used to increase the efficiency of exfoliation and expansion of the graphitic interlayers in GO.
Original language | English |
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Pages (from-to) | 112-117 |
Number of pages | 6 |
Journal | Carbon |
Volume | 68 |
DOIs | |
State | Published - Mar 2014 |
Bibliographical note
Funding Information:This work was supported by the Korea CCS R&D Center (KCRC) grant funded by the Korea government ( 0031985 ).