Tuning of texture and surface chemistry of carbon xerogels
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 d...
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| Veröffentlicht in: | Journal of colloid and interface science 2008-08, Vol.324 (1), p.150-155 |
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| container_title | Journal of colloid and interface science |
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| creator | Mahata, N. Pereira, M.F.R. Suárez-García, F. Martínez-Alonso, A. Tascón, J.M.D. Figueiredo, J.L. |
| description | 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 HNO
3, and activation by diluted air. Treatments with HNO
3 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.
Deconvolution of the CO
2 TPD spectra for the oxygen plasma-activated carbon xerogel. |
| doi_str_mv | 10.1016/j.jcis.2008.05.006 |
| format | Article |
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3, and activation by diluted air. Treatments with HNO
3 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.
Deconvolution of the CO
2 TPD spectra for the oxygen plasma-activated carbon xerogel.</description><identifier>ISSN: 0021-9797</identifier><identifier>EISSN: 1095-7103</identifier><identifier>DOI: 10.1016/j.jcis.2008.05.006</identifier><identifier>PMID: 18533175</identifier><identifier>CODEN: JCISA5</identifier><language>eng</language><publisher>San Diego, CA: Elsevier Inc</publisher><subject>Air ; Carbon - chemistry ; Carbon xerogel ; Catalysis ; Catalyst support ; Chemistry ; Colloidal gels. Colloidal sols ; Colloidal state and disperse state ; Exact sciences and technology ; Gels - chemistry ; General and physical chemistry ; Hydrogen-Ion Concentration ; Oxygen plasma ; Porosity ; Porous materials ; Surface activation ; Surface physical chemistry ; Surface Properties ; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</subject><ispartof>Journal of colloid and interface science, 2008-08, Vol.324 (1), p.150-155</ispartof><rights>2008 Elsevier Inc.</rights><rights>2008 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c450t-5d5ff16347fbd78c2fa6496f24e24b27fbd0d0a18dcb6489607c0e82a92a80603</citedby><cites>FETCH-LOGICAL-c450t-5d5ff16347fbd78c2fa6496f24e24b27fbd0d0a18dcb6489607c0e82a92a80603</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0021979708005675$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65534</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=20488394$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/18533175$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Mahata, N.</creatorcontrib><creatorcontrib>Pereira, M.F.R.</creatorcontrib><creatorcontrib>Suárez-García, F.</creatorcontrib><creatorcontrib>Martínez-Alonso, A.</creatorcontrib><creatorcontrib>Tascón, J.M.D.</creatorcontrib><creatorcontrib>Figueiredo, J.L.</creatorcontrib><title>Tuning of texture and surface chemistry of carbon xerogels</title><title>Journal of colloid and interface science</title><addtitle>J Colloid Interface Sci</addtitle><description>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 HNO
3, and activation by diluted air. Treatments with HNO
3 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.
Deconvolution of the CO
2 TPD spectra for the oxygen plasma-activated carbon xerogel.</description><subject>Air</subject><subject>Carbon - chemistry</subject><subject>Carbon xerogel</subject><subject>Catalysis</subject><subject>Catalyst support</subject><subject>Chemistry</subject><subject>Colloidal gels. Colloidal sols</subject><subject>Colloidal state and disperse state</subject><subject>Exact sciences and technology</subject><subject>Gels - chemistry</subject><subject>General and physical chemistry</subject><subject>Hydrogen-Ion Concentration</subject><subject>Oxygen plasma</subject><subject>Porosity</subject><subject>Porous materials</subject><subject>Surface activation</subject><subject>Surface physical chemistry</subject><subject>Surface Properties</subject><subject>Theory of reactions, general kinetics. Catalysis. 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Colloidal sols</topic><topic>Colloidal state and disperse state</topic><topic>Exact sciences and technology</topic><topic>Gels - chemistry</topic><topic>General and physical chemistry</topic><topic>Hydrogen-Ion Concentration</topic><topic>Oxygen plasma</topic><topic>Porosity</topic><topic>Porous materials</topic><topic>Surface activation</topic><topic>Surface physical chemistry</topic><topic>Surface Properties</topic><topic>Theory of reactions, general kinetics. Catalysis. 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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 HNO
3, and activation by diluted air. Treatments with HNO
3 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.
Deconvolution of the CO
2 TPD spectra for the oxygen plasma-activated carbon xerogel.</abstract><cop>San Diego, CA</cop><pub>Elsevier Inc</pub><pmid>18533175</pmid><doi>10.1016/j.jcis.2008.05.006</doi><tpages>6</tpages></addata></record> |
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| source | MEDLINE; Elsevier ScienceDirect Journals Complete |
| subjects | Air Carbon - chemistry Carbon xerogel Catalysis Catalyst support Chemistry Colloidal gels. Colloidal sols Colloidal state and disperse state Exact sciences and technology Gels - chemistry General and physical chemistry Hydrogen-Ion Concentration Oxygen plasma Porosity Porous materials Surface activation Surface physical chemistry Surface Properties Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry |
| title | Tuning of texture and surface chemistry of carbon xerogels |
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