Improving the capacitive deionisation performance by optimising pore structures of the electrodes

Linda Zou, Lixia Li, Huaihe Song, Gayle Morris

    Research output: Contribution to journalArticle

    9 Citations (Scopus)

    Abstract

    In this paper, three types of ordered mesoporous carbons (OMCs) were synthesised by an original template method and a modified sol-gel process involving nickel salts. The effects of pore arrangement pattern (ordered and random), and pore size distribution (mesoporous and microporous) on the desalination performance were investigated by comparing mesoporous carbons with activated carbons (ACs). It is found that the mesoporous carbons prepared by addition of nickel salts demonstrated higher specific capacitances than mesoporous carbons without nickel salts and the activated carbon electrodes. Their electrosorptive deionisation properties were also compared in a dilute NaCl solution (conductivity 100 μScm-1), the amount of adsorbed ions are measured by a flow though apparatus in the laboratory. It is found that the amounts of the adsorbed ions are 15.9 μmolg-1 for OMCs involving nickel in the synthesis process, 10.3 μmol g-1 for OMC not involving nickel salts and 4.7 μmol g-1 for ACs.

    Original languageEnglish
    Pages (from-to)1227-1233
    Number of pages7
    JournalWater Science and Technology
    Volume61
    Issue number5
    DOIs
    Publication statusPublished - 2010

    Keywords

    • Activated carbons
    • Capacitive deionisation
    • Electrosorption
    • Mesoporous carbon electrodes

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