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    KOH catalysed preparation of activated carbon aerogels for dye adsorption

    Access Status
    Fulltext not available
    Authors
    Ling, Sie King
    Tian, Hu-Yong
    Wang, Shaobin
    Rufford, T.
    Zhu, Z.
    Buckley, Craig
    Date
    2011
    Type
    Journal Article
    
    Metadata
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    Citation
    Ling, Sie King and Tian, H. Y. and Wang, Shaobin and Rufford, Thomas and Zhu, Z. H. and Buckley, C. E. 2011. KOH catalysed preparation of activated carbon aerogels for dye adsorption. Journal of Colloid and Interface Science. 357 (1): pp. 157-162.
    Source Title
    Journal of Colloid and Interface Science
    DOI
    10.1016/j.jcis.2011.01.092
    ISSN
    00219797
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/6305
    Collection
    • Curtin Research Publications
    Abstract

    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.

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