Heavy doping of H- ion in 12CaO·7Al2O 3

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

12CaO·7Al2O3 (C12A7, mayenite), which has a nanoscale porous structure that can accommodate extraframework species such as hydride (H-), oxide (O2-), hydroxide (OH-) ions, and electrons, has been doped with H- ions to investigate its effects as dominant extraframework species. Chemical doping with CaH2 enables the concentration of H- ions to reach almost the theoretical maximum. The concentration of H- ions is characterized by optical absorption intensity ascribed to photoionization of H- ions, and 1H magic angle spinning nuclear magnetic resonance (MAS-NMR) spectroscopy. Persistent electron generation, which is accompanied by the formation of an F absorption band and electrical conductivity, by irradiation with ultraviolet light at room temperature increases as the H- ion doping increases until it reaches half the theoretical maximum and then decreases as the H- ion concentration increases further. This dependence indicates that both H- and O2- ions are necessary for the generation of persistent electrons.

Original languageEnglish
Pages (from-to)1428-1432
Number of pages5
JournalJournal of Solid State Chemistry
Volume184
Issue number6
DOIs
Publication statusPublished - Jun 1 2011
Externally publishedYes

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Doping (additives)
Ions
ions
Electrons
electrons
magnetic resonance spectroscopy
Photoionization
Magic angle spinning
ion concentration
ultraviolet radiation
metal spinning
hydroxides
hydrides
photoionization
Hydrides
Oxides
Light absorption
optical absorption
Nuclear magnetic resonance spectroscopy
Absorption spectra

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Heavy doping of H- ion in 12CaO·7Al2O 3. / Hayashi, Katsuro.

In: Journal of Solid State Chemistry, Vol. 184, No. 6, 01.06.2011, p. 1428-1432.

Research output: Contribution to journalArticle

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