热处理对 KOH 活化石墨纳米纤维 CO2 吸附性能的影响。
Effect of heat treatment on CO2 adsorption of KOH-activated graphite nanofibers.
机构信息
Department of Chemistry, Inha University, 253 Nam-gu, Incheon 402-751, South Korea.
出版信息
J Colloid Interface Sci. 2010 Dec 15;352(2):498-503. doi: 10.1016/j.jcis.2010.08.048. Epub 2010 Aug 21.
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 CO(2) 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 N(2) full isotherms, XRD, SEM, and TEM. The CO(2) adsorption capacity was measured by CO(2) isothermal adsorption at 25 °C and 1 atm. From the results, it was found that the activation temperature had a major influence on CO(2) 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 CO(2) adsorption isotherms showed that G-900 exhibited the best CO(2) adsorption capacity with 59.2 mg/g.
在这项工作中，成功地通过插层 KOH 对石墨纳米纤维 (GNFs) 进行了膨胀，然后在 700-1000°C 的温度范围内进行热处理。目的是通过增加 GNFs 的孔隙率来提高 GNFs 的 CO(2)吸附能力。通过 N(2)全等温线、XRD、SEM 和 TEM 研究了热处理对 GNFs 孔结构的影响。通过 25°C 和 1 个大气压下的 CO(2)等温吸附测量了 CO(2)的吸附能力。结果表明，活化温度对 GNFs 的 CO(2)吸附能力和结构性能有重大影响。GNFs 的比表面积、总孔体积和中孔体积在热处理后增加。CO(2)吸附等温线表明，G-900 表现出最佳的 CO(2)吸附能力，为 59.2mg/g。
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