ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
This work explores an estimation of adsorptive surface coverage for carbon tetrachlorideonto different carbon nanofibers (CNFs). Two kinds of CNFs with various pore characteristics arefabricated by template-based and thermal chemical vapor deposition methods, respectively. Thepore size distributions of these carbons, determined according to the density functional theorymodel, are found to vary with synthesis methods. The results of adsorption experiments show thatCCl4 adsorption isotherms of these CNFs are of Langmuir-type model during the restricted pressureof 0–0.2 atm at 30°C. The surface coverage capable of adsorbing CCl4 molecules onto the CNFscan be determined based on the monolayer adsorption model. Interestingly, the CCl4 capacity ofthese CNFs does not proportionally increase with their specific surface area, and the CNFs withmore micropore fraction facilitate the adsorptive surface coverage. This finding attributes to a factthat micropores in the CNFs have stronger adsorption energies, thus, become a major provider forcarbon tetrachloride adsorption
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.121-123.417.pdf
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