CO2 Adsorption on Dahlia-Like Carbon Nanohorns: Isosteric Heat and Surface Area Measurements
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- 作者：Vaiva Krungleviciute ; Aldo D. Migone ; M. Yudasaka ; S. Iijima
- 刊名：The Journal of Physical Chemistry C
- 出版年：2012
- 出版时间：January 12, 2012
- 年：2012
- 卷：116
- 期：1
- 页码：306-310
- 全文大小：337K
- 年卷期：v.116,no.1(January 12, 2012)
- ISSN：1932-7455
文摘
We present the results of an adsorption study of carbon dioxide on closed dahlia-like single-walled carbon nanohorn aggregates. The study was conducted to explore the sorptive capacity of the nanohorns and the dependence of the CO2鈥檚 isosteric heat of adsorption on sorbent loading. We found that there are no steps present in the carbon dioxide isotherms and that the isosteric heat of adsorption has an unusual nonmonotonic dependence on loading. Both of these behaviors are opposite to what is observed for other simple gases (argon, methane, neon, etc.) adsorbed on the same sorbent. The effective specific surface area of the nanohorn aggregates was determined using the BET and point-B methods.