| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 609240 | Journal of Colloid and Interface Science | 2010 | 6 Pages |
In this work, graphite nanofibers (GNFs) were successfully expanded intercalating KOH followed by heat treatment in the temperature range of 700–1000 °C. The aim was to improve the CO2 adsorption capacity of the GNFs by increasing the porosity of GNFs. The effects of heat treatment on the pore structures of GNFs were investigated by N2 full isotherms, XRD, SEM, and TEM. The CO2 adsorption capacity was measured by CO2 isothermal adsorption at 25 °C and 1 atm. From the results, it was found that the activation temperature had a major influence on CO2 adsorption capacity and textural properties of GNFs. The specific surface area, total pore volume, and mesopore volume of the GNFs increased after heat treatment. The CO2 adsorption isotherms showed that G-900 exhibited the best CO2 adsorption capacity with 59.2 mg/g.
Graphical abstractIn this work, graphite nanofibers (GNFs) were successfully expanded intercalating KOH followed by heat treatment in the temperature range of 700–1000 °C for CO2 adsorption.Figure optionsDownload full-size imageDownload high-quality image (77 K)Download as PowerPoint slideResearch highlights► In this work, graphite nanofibers (GNFs) were successfully expanded intercalating KOH followed by heat treatment in the temperature range of 700–1000 °C for CO2 adsorption. ► The adsorption and desorption isotherms of GNFs shown in these plots basically follow the same path, suggesting that the adsorption process is reversible and the adsorbed molecules can be recovered during the desorption process. ► The CO2 adsorption capacity of GNFs rose from 22.2 to 59.2 mg/g at 25 °C and 1 atm.
