Synthesis of carbon xerogels at varying sol–gel pHs, dye adsorption and chemical regeneration
Several carbon xerogels were synthesized at varying sol–gel pHs of 6–10 using KOH as a catalyst. The porous structure, dye adsorption and regeneration by chemical oxidation of the carbon xerogels were comprehensively investigated. It was found that sol–gel pH significantly affected the porous struct...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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Elsevier BV
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/4162 |
| _version_ | 1848744437834842112 |
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| author | Zhou, Guanliang Tian, Hu-Yong Sun, Hongqi Wang, Shaobin Buckley, Craig |
| author_facet | Zhou, Guanliang Tian, Hu-Yong Sun, Hongqi Wang, Shaobin Buckley, Craig |
| author_sort | Zhou, Guanliang |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Several carbon xerogels were synthesized at varying sol–gel pHs of 6–10 using KOH as a catalyst. The porous structure, dye adsorption and regeneration by chemical oxidation of the carbon xerogels were comprehensively investigated. It was found that sol–gel pH significantly affected the porous structure and adsorption properties of carbon xerogels. The sol–gel pHs of 6–9 did not have a significant influence on surface area, micropore surface area, crystalline structure, combustion and desorption behavior of carbon xerogels, however, the pore size was different with development of mesopores at higher pH. When the pH was higher than 9, the carbon xerogel still possessed a highly porous structure. The surface area, micropore surface area, and combustion temperature could be reduced by 30%. Adsorption tests demonstrated high capacity of the carbon xerogels in dye adsorption. Due to loss of surface area and pore volume, the carbon xerogel synthesized at higher pH (>9) exhibited lower dye adsorption. For different types of dye, the carbon xerogels exhibited strong adsorption capacity for methylene blue and acid blue 40, but low adsorption of reactive black 5. Regeneration of the carbon xerogels using a chemical oxidation with Co2+/oxone recovered the adsorption capacity by 70%. |
| first_indexed | 2025-11-14T06:01:27Z |
| format | Journal Article |
| id | curtin-20.500.11937-4162 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:01:27Z |
| publishDate | 2011 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-41622017-09-13T16:09:10Z Synthesis of carbon xerogels at varying sol–gel pHs, dye adsorption and chemical regeneration Zhou, Guanliang Tian, Hu-Yong Sun, Hongqi Wang, Shaobin Buckley, Craig Structure Adsorption Chemical regeneration Synthesis pH Carbon xerogel Several carbon xerogels were synthesized at varying sol–gel pHs of 6–10 using KOH as a catalyst. The porous structure, dye adsorption and regeneration by chemical oxidation of the carbon xerogels were comprehensively investigated. It was found that sol–gel pH significantly affected the porous structure and adsorption properties of carbon xerogels. The sol–gel pHs of 6–9 did not have a significant influence on surface area, micropore surface area, crystalline structure, combustion and desorption behavior of carbon xerogels, however, the pore size was different with development of mesopores at higher pH. When the pH was higher than 9, the carbon xerogel still possessed a highly porous structure. The surface area, micropore surface area, and combustion temperature could be reduced by 30%. Adsorption tests demonstrated high capacity of the carbon xerogels in dye adsorption. Due to loss of surface area and pore volume, the carbon xerogel synthesized at higher pH (>9) exhibited lower dye adsorption. For different types of dye, the carbon xerogels exhibited strong adsorption capacity for methylene blue and acid blue 40, but low adsorption of reactive black 5. Regeneration of the carbon xerogels using a chemical oxidation with Co2+/oxone recovered the adsorption capacity by 70%. 2011 Journal Article http://hdl.handle.net/20.500.11937/4162 10.1016/j.cej.2011.05.054 Elsevier BV restricted |
| spellingShingle | Structure Adsorption Chemical regeneration Synthesis pH Carbon xerogel Zhou, Guanliang Tian, Hu-Yong Sun, Hongqi Wang, Shaobin Buckley, Craig Synthesis of carbon xerogels at varying sol–gel pHs, dye adsorption and chemical regeneration |
| title | Synthesis of carbon xerogels at varying sol–gel pHs, dye adsorption and chemical regeneration |
| title_full | Synthesis of carbon xerogels at varying sol–gel pHs, dye adsorption and chemical regeneration |
| title_fullStr | Synthesis of carbon xerogels at varying sol–gel pHs, dye adsorption and chemical regeneration |
| title_full_unstemmed | Synthesis of carbon xerogels at varying sol–gel pHs, dye adsorption and chemical regeneration |
| title_short | Synthesis of carbon xerogels at varying sol–gel pHs, dye adsorption and chemical regeneration |
| title_sort | synthesis of carbon xerogels at varying sol–gel phs, dye adsorption and chemical regeneration |
| topic | Structure Adsorption Chemical regeneration Synthesis pH Carbon xerogel |
| url | http://hdl.handle.net/20.500.11937/4162 |