Hierarchically porous monoliths based on N-doped reduced titanium oxides and their electric and electrochemical properties

George Hasegawa, Tatsuya Sato, Kazuyoshi Kanamori, Kousuke Nakano, Takeshi Yajima, Yoji Kobayashi, Hiroshi Kageyama, Takeshi Abe, Kazuki Nakanishi

    研究成果: Contribution to journalArticle査読

    40 被引用数 (Scopus)

    抄録

    In this report, we demonstrate a novel synthesis method to obtain reduced titanium oxides with monolithic shape and with a well-defined hierarchically porous structure from the titanium-based network bridged with ethylenediamine. The hierarchically porous monoliths are fabricated by the nonhydrolytic sol-gel reaction accompanied by phase separation. This method allows a low-temperature crystallization into Ti4O7 and Ti3O5 at 800 and 900 C, respectively, with N-doped carbon. These reduced titanium oxides are well-doped with N atoms even under argon atmosphere without NH 3, which accounts for the low-temperature reduction. The resultant monolithic materials possess controllable macropores and high specific surface area together with excellent electric conductivity up to 230 S cm-1, indicating promise as a conductive substrate that can substitute carbon electrodes.

    本文言語英語
    ページ(範囲)3504-3512
    ページ数9
    ジャーナルChemistry of Materials
    25
    17
    DOI
    出版ステータス出版済み - 9 10 2013

    All Science Journal Classification (ASJC) codes

    • Chemistry(all)
    • Chemical Engineering(all)
    • Materials Chemistry

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