Iodometric determination of electrons incorporated into cages in 12CaO·7Al2O3 Crystals

Toshihiro Yoshizumi, Satoru Matsuishi, Sung Wng Kim, Hideo Hosono, Katsuro Hayashi

研究成果: Contribution to journalArticle査読

19 被引用数 (Scopus)

抄録

The accurate determination of the concentration of electrons incorporated into cages in 12CaO·7Al2O3 (C12A7) has been examined using iodometry. Preliminary experiments confirmed that iodine is reduced in preference to protons by electron-enriched C12A7, even in aqueous solution. The electron concentrations in several C12A7 samples are measured using a procedure where the iodine molecules in an I2-HCl solution are partially reduced by electrons released from the samples, followed by titration of the residual iodine molecules. The accuracy of this procedure is confirmed by the excellent agreement of the results with those from thermogravimetric analysis. The reevaluated maximum electron mobility is nearly twice as high as that reported previously, and the critical electron concentration for the metal-insulator transition is revised slightly because of the accuracy of the iodometry results.

本文言語英語
ページ(範囲)15354-15357
ページ数4
ジャーナルJournal of Physical Chemistry C
114
36
DOI
出版ステータス出版済み - 9 16 2010
外部発表はい

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • エネルギー(全般)
  • 物理化学および理論化学
  • 表面、皮膜および薄膜

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