Effect of heat treatment on CO2 adsorption of KOH-activated graphite nanofibers

Long Yue Meng; Soo Jin Park

doi:10.1016/j.jcis.2010.08.048

Effect of heat treatment on CO₂ adsorption of KOH-activated graphite nanofibers

Long Yue Meng, Soo Jin Park

Inha University

Research output: Contribution to journal › Article › peer-review

128 Scopus citations

Abstract

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 1atm. 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 59.2mg/g.

Original language	English
Pages (from-to)	498-503
Number of pages	6
Journal	Journal of Colloid and Interface Science
Volume	352
Issue number	2
DOIs	https://doi.org/10.1016/j.jcis.2010.08.048
State	Published - 15 Dec 2010

Keywords

CO2 adsorption
Graphite nanofibers
Heat treatment
KOH

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10.1016/j.jcis.2010.08.048

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title = "Effect of heat treatment on CO2 adsorption of KOH-activated graphite nanofibers",

abstract = "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 1atm. 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 59.2mg/g.",

keywords = "CO2 adsorption, Graphite nanofibers, Heat treatment, KOH",

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T1 - Effect of heat treatment on CO2 adsorption of KOH-activated graphite nanofibers

AU - Meng, Long Yue

AU - Park, Soo Jin

PY - 2010/12/15

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N2 - 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 1atm. 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 59.2mg/g.

AB - 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 1atm. 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 59.2mg/g.

KW - CO2 adsorption

KW - Graphite nanofibers

KW - Heat treatment

KW - KOH

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Effect of heat treatment on CO₂ adsorption of KOH-activated graphite nanofibers

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Keywords

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