Tuning of texture and surface chemistry of carbon xerogels
6 pages, 4 figures, 5 tables.-- PMID: 18533175 [PubMed].-- Printed version published Aug 2008.
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| Format: | artículo biblioteca |
| Language: | English |
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Elsevier
2008-05-10
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| Subjects: | Carbon xerogels, Surface activation, Oxygen plasma, Catalyst support, |
| Online Access: | http://hdl.handle.net/10261/11708 |
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dig-incar-es-10261-117082018-11-16T08:02:03Z Tuning of texture and surface chemistry of carbon xerogels Mahata, N. Pereira, M. F. R. Suárez García, Fabián Martínez Alonso, Amelia Díez Tascón, Juan Manuel Figueiredo, José Luís Carbon xerogels Surface activation Oxygen plasma Catalyst support 6 pages, 4 figures, 5 tables.-- PMID: 18533175 [PubMed].-- Printed version published Aug 2008. The influence of different activation processes on the textural and surface chemical properties of carbon xerogels was studied. Carbon xerogels were prepared by the conventional sol–gel approach using resorcinol and formaldehyde; two different pHs of sol–gel processing led to carbon materials with distinct pore size distributions. The materials were subjected to controlled activation by three different methods: activation by oxygen plasma, activation by HNO3, and activation by diluted air. Treatments with HNO3 and diluted air created oxygen groups on the external surface as well as inside the pore channels, whereas plasma is more suitable for introducing oxygen groups selectively on the external surface. Nevertheless, it was shown that samples with wider pores can be oxidized to some extent on the pore interiors by plasma. Significant changes in total surface area by air activation were observed. This work was supported by “Fundação para a Ciência e a Tecnologia,” under programme POCTI/FEDER (POCTI 1181) and Project POCI/EQU/57369/2004 “Nanostructured carbon catalysts” and by the GRICES/CSIC cooperation in science and technology program. N.M. thanks FCT for a postdoctoral grant (SFRH/BPD/14804/2003). Peer reviewed 2009-03-18T08:37:00Z 2009-03-18T08:37:00Z 2008-05-10 artículo http://purl.org/coar/resource_type/c_6501 Journal of Colloid and Interface Science 324(1-2): 150-155 (2008) 0021-9797 http://hdl.handle.net/10261/11708 10.1016/j.jcis.2008.05.006 en http://dx.doi.org/10.1016/j.jcis.2008.05.006 none 22195 bytes application/pdf Elsevier |
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Carbon xerogels Surface activation Oxygen plasma Catalyst support Carbon xerogels Surface activation Oxygen plasma Catalyst support |
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Carbon xerogels Surface activation Oxygen plasma Catalyst support Carbon xerogels Surface activation Oxygen plasma Catalyst support Mahata, N. Pereira, M. F. R. Suárez García, Fabián Martínez Alonso, Amelia Díez Tascón, Juan Manuel Figueiredo, José Luís Tuning of texture and surface chemistry of carbon xerogels |
| description |
6 pages, 4 figures, 5 tables.-- PMID: 18533175 [PubMed].-- Printed version published Aug 2008. |
| format |
artículo |
| topic_facet |
Carbon xerogels Surface activation Oxygen plasma Catalyst support |
| author |
Mahata, N. Pereira, M. F. R. Suárez García, Fabián Martínez Alonso, Amelia Díez Tascón, Juan Manuel Figueiredo, José Luís |
| author_facet |
Mahata, N. Pereira, M. F. R. Suárez García, Fabián Martínez Alonso, Amelia Díez Tascón, Juan Manuel Figueiredo, José Luís |
| author_sort |
Mahata, N. |
| title |
Tuning of texture and surface chemistry of carbon xerogels |
| title_short |
Tuning of texture and surface chemistry of carbon xerogels |
| title_full |
Tuning of texture and surface chemistry of carbon xerogels |
| title_fullStr |
Tuning of texture and surface chemistry of carbon xerogels |
| title_full_unstemmed |
Tuning of texture and surface chemistry of carbon xerogels |
| title_sort |
tuning of texture and surface chemistry of carbon xerogels |
| publisher |
Elsevier |
| publishDate |
2008-05-10 |
| url |
http://hdl.handle.net/10261/11708 |
| work_keys_str_mv |
AT mahatan tuningoftextureandsurfacechemistryofcarbonxerogels AT pereiramfr tuningoftextureandsurfacechemistryofcarbonxerogels AT suarezgarciafabian tuningoftextureandsurfacechemistryofcarbonxerogels AT martinezalonsoamelia tuningoftextureandsurfacechemistryofcarbonxerogels AT dieztasconjuanmanuel tuningoftextureandsurfacechemistryofcarbonxerogels AT figueiredojoseluis tuningoftextureandsurfacechemistryofcarbonxerogels |
| _version_ |
1777668873952165888 |