Estimation of the Surface Properties of Unmodifed and Strongly Oxidized Active Carbons on the Basis of Water Vapour Adsorption Isotherms
Water vapour adsorption isotherms were measured for a series of commercial active carbons and one carbon black oxidized with concentrated nitric acid at its boiling temperature. A comparative analysis of the surface properties of the unmodified and strongly oxidized active carbons was performed on t...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
1998-04-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1177/026361749801600406 |
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| author | J. Choma M. Jaroniec |
| author_facet | J. Choma M. Jaroniec |
| author_sort | J. Choma |
| collection | DOAJ |
| description | Water vapour adsorption isotherms were measured for a series of commercial active carbons and one carbon black oxidized with concentrated nitric acid at its boiling temperature. A comparative analysis of the surface properties of the unmodified and strongly oxidized active carbons was performed on the basis of the adsorption potential distributions (APDs) calculated from these adsorption isotherms. It was shown that the APDs for oxidized carbons exhibit some extra details (e.g., peaks) in the range of high adsorption potentials which can be assigned to interactions of water molecules with oxygen surface groups formed during the oxidation process. This is especially visible for oxidized carbon black. The observed sensitivity of the APDs obtained from water vapour adsorption isotherms make them attractive functions for monitoring the surface changes in active carbons due to their oxidation. |
| format | Article |
| id | doaj-art-0324a53981184d6b8b8b4a54dd5f055d |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 1998-04-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-0324a53981184d6b8b8b4a54dd5f055d2025-02-03T10:08:00ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40381998-04-011610.1177/026361749801600406Estimation of the Surface Properties of Unmodifed and Strongly Oxidized Active Carbons on the Basis of Water Vapour Adsorption IsothermsJ. Choma0M. Jaroniec1 Institute of Chemistry, Military Technical Academy, 01-489 Warsaw, Poland Separation and Surface Science Center, Department of Chemistry, Kent State University, 44-242 Kent, Ohio, USAWater vapour adsorption isotherms were measured for a series of commercial active carbons and one carbon black oxidized with concentrated nitric acid at its boiling temperature. A comparative analysis of the surface properties of the unmodified and strongly oxidized active carbons was performed on the basis of the adsorption potential distributions (APDs) calculated from these adsorption isotherms. It was shown that the APDs for oxidized carbons exhibit some extra details (e.g., peaks) in the range of high adsorption potentials which can be assigned to interactions of water molecules with oxygen surface groups formed during the oxidation process. This is especially visible for oxidized carbon black. The observed sensitivity of the APDs obtained from water vapour adsorption isotherms make them attractive functions for monitoring the surface changes in active carbons due to their oxidation.https://doi.org/10.1177/026361749801600406 |
| spellingShingle | J. Choma M. Jaroniec Estimation of the Surface Properties of Unmodifed and Strongly Oxidized Active Carbons on the Basis of Water Vapour Adsorption Isotherms Adsorption Science & Technology |
| title | Estimation of the Surface Properties of Unmodifed and Strongly Oxidized Active Carbons on the Basis of Water Vapour Adsorption Isotherms |
| title_full | Estimation of the Surface Properties of Unmodifed and Strongly Oxidized Active Carbons on the Basis of Water Vapour Adsorption Isotherms |
| title_fullStr | Estimation of the Surface Properties of Unmodifed and Strongly Oxidized Active Carbons on the Basis of Water Vapour Adsorption Isotherms |
| title_full_unstemmed | Estimation of the Surface Properties of Unmodifed and Strongly Oxidized Active Carbons on the Basis of Water Vapour Adsorption Isotherms |
| title_short | Estimation of the Surface Properties of Unmodifed and Strongly Oxidized Active Carbons on the Basis of Water Vapour Adsorption Isotherms |
| title_sort | estimation of the surface properties of unmodifed and strongly oxidized active carbons on the basis of water vapour adsorption isotherms |
| url | https://doi.org/10.1177/026361749801600406 |
| work_keys_str_mv | AT jchoma estimationofthesurfacepropertiesofunmodifedandstronglyoxidizedactivecarbonsonthebasisofwatervapouradsorptionisotherms AT mjaroniec estimationofthesurfacepropertiesofunmodifedandstronglyoxidizedactivecarbonsonthebasisofwatervapouradsorptionisotherms |