KOH catalysed preparation of activated carbon aerogels for dye adsorption
Organic carbon aerogels (CAs) were prepared by a sol–gel method from polymerisation of resorcinol, furfural, and hexamethylenetetramine catalysed by KOH at around pH 9 using ambient pressure drying. The effect of KOH in the sol–gel on CA synthesis was studied. It was found that addition of KOH prior...
| Main Authors: | , , , , , |
|---|---|
| Format: | Journal Article |
| Published: |
Elsevier
2011
|
| Online Access: | http://hdl.handle.net/20.500.11937/6305 |
| _version_ | 1848745037965295616 |
|---|---|
| author | Ling, Sie King Tian, Hu-Yong Wang, Shaobin Rufford, T. Zhu, Z. Buckley, Craig |
| author_facet | Ling, Sie King Tian, Hu-Yong Wang, Shaobin Rufford, T. Zhu, Z. Buckley, Craig |
| author_sort | Ling, Sie King |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Organic carbon aerogels (CAs) were prepared by a sol–gel method from polymerisation of resorcinol, furfural, and hexamethylenetetramine catalysed by KOH at around pH 9 using ambient pressure drying. The effect of KOH in the sol–gel on CA synthesis was studied. It was found that addition of KOH prior to the sol–gel polymerisation process improved thermal stability of the gel, prevented the crystallinity of the gel to graphite, increased the microporosity of CA and promoted activation of CA. The CAs prepared using the KOH catalyst exhibited higher porosity than uncatalysed prepared samples. Activation in CO2 at higher temperature also enhanced the porosity of CAs. Adsorption tests indicated that the CAs were effective for both basic and acid dye adsorption and the adsorption increased with increasing surface area and pore volume. The kinetic adsorption of dyes was diffusion control and could be described by the second-order kinetic model. The equilibrium adsorption of dyes was higher than activated carbon. |
| first_indexed | 2025-11-14T06:11:00Z |
| format | Journal Article |
| id | curtin-20.500.11937-6305 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:11:00Z |
| publishDate | 2011 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-63052017-09-13T16:08:11Z KOH catalysed preparation of activated carbon aerogels for dye adsorption Ling, Sie King Tian, Hu-Yong Wang, Shaobin Rufford, T. Zhu, Z. Buckley, Craig Organic carbon aerogels (CAs) were prepared by a sol–gel method from polymerisation of resorcinol, furfural, and hexamethylenetetramine catalysed by KOH at around pH 9 using ambient pressure drying. The effect of KOH in the sol–gel on CA synthesis was studied. It was found that addition of KOH prior to the sol–gel polymerisation process improved thermal stability of the gel, prevented the crystallinity of the gel to graphite, increased the microporosity of CA and promoted activation of CA. The CAs prepared using the KOH catalyst exhibited higher porosity than uncatalysed prepared samples. Activation in CO2 at higher temperature also enhanced the porosity of CAs. Adsorption tests indicated that the CAs were effective for both basic and acid dye adsorption and the adsorption increased with increasing surface area and pore volume. The kinetic adsorption of dyes was diffusion control and could be described by the second-order kinetic model. The equilibrium adsorption of dyes was higher than activated carbon. 2011 Journal Article http://hdl.handle.net/20.500.11937/6305 10.1016/j.jcis.2011.01.092 Elsevier restricted |
| spellingShingle | Ling, Sie King Tian, Hu-Yong Wang, Shaobin Rufford, T. Zhu, Z. Buckley, Craig KOH catalysed preparation of activated carbon aerogels for dye adsorption |
| title | KOH catalysed preparation of activated carbon aerogels for dye adsorption |
| title_full | KOH catalysed preparation of activated carbon aerogels for dye adsorption |
| title_fullStr | KOH catalysed preparation of activated carbon aerogels for dye adsorption |
| title_full_unstemmed | KOH catalysed preparation of activated carbon aerogels for dye adsorption |
| title_short | KOH catalysed preparation of activated carbon aerogels for dye adsorption |
| title_sort | koh catalysed preparation of activated carbon aerogels for dye adsorption |
| url | http://hdl.handle.net/20.500.11937/6305 |