Carbon-coated mesoporous silica as an electrode material

Taeri Kwon, Hirotomo Nishihara, Yu Fukura, Kouta Inde, Norihiko Setoyama, Yoshiaki Fukushima, Takashi Kyotani

    Research output: Contribution to journalArticlepeer-review

    20 Citations (Scopus)

    Abstract

    The entire pore surface of FSM-16 type mesoporous silica was uniformly coated with a thin carbon layer by carbonizing pre-doped organic-alcohol molecules onto the pore surface. The thickness of the carbon layer was estimated to be extremely thin, i.e., it corresponds to only 1-2 graphene layers. Even after the carbon-coating, FSM-16 preserves its intrinsic ordered pore structure (hexagonal array of cylindrical pores) and still possesses high surface area of 530 m2 g-1, but its pore nature was completely converted into a hydrophobic one, which was revealed from a very small amount of water-vapor adsorption. We characterized the electrochemical properties of the carbon-coated FSM-16 together with the carbon-coated SBA-15 synthesized by using the same coating method. Both of them exhibited electric double-layer capacitance in 1 M H2SO4 and 1 M NaCl, and the values of the capacitance per surface area are comparable to those of conventional activated carbons. We can thus conclude that the present carbon-coating changes the nature of mesoporous silicas from an insulator to an electrical conductor with their ordered pore structures unchanged, and the carbon-coated mesoporous silicas can be used as electrode materials with uniform pores.

    Original languageEnglish
    Pages (from-to)421-427
    Number of pages7
    JournalMicroporous and Mesoporous Materials
    Volume132
    Issue number3
    DOIs
    Publication statusPublished - 2010 Aug

    Keywords

    • 2,3-Dihydroxynaphthalene
    • Dehydration/esterification
    • Graphene
    • Ordered mesoporous carbons
    • Silanol groups

    ASJC Scopus subject areas

    • Chemistry(all)
    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials

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