Preparation of hexagonal MoO3 by "Chimie Douce" reaction with NO2

Yuji Muraoka, J. C. Grenier, S. Petit, M. Pouchard

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

The metastable hexagonal form of MoO3 has been successfully prepared starting from the ammonium molybdate, using a "Chimie Douce" reaction with NO2 gas. The lattice parameters of the as-prepared material were determined by XRD analysis to be : a= 10.633(2) Å and c = 3.719(1) Å. The composition of this material obtained by physical and chemical analysis is MoO3, 0.09 H2O, showing that a small amount of water molecules remained while there were no more ammonium ions in this structure. The structural transformation from hexagonal to stable orthorhombic α-MoO3 phase was observed at 350°C. It was also shown that NO2 reaction is a very useful method to remove topotactically ammonium ions from a parent structure at low temperature. This "Chimie Douce" process appears to be very promising for obtaining new metastable oxides with large tunnels or interlayer distances.

Original languageEnglish
Pages (from-to)133-148
Number of pages16
JournalSolid State Sciences
Volume1
Issue number2-3
DOIs
Publication statusPublished - Jan 1 1999
Externally publishedYes

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Ammonium Compounds
preparation
molybdates
Ions
Chemical analysis
chemical analysis
Lattice constants
tunnels
interlayers
lattice parameters
Tunnels
ions
Oxides
Molecules
oxides
Gases
gases
water
Water
molecules

ASJC Scopus subject areas

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

Cite this

Preparation of hexagonal MoO3 by "Chimie Douce" reaction with NO2 . / Muraoka, Yuji; Grenier, J. C.; Petit, S.; Pouchard, M.

In: Solid State Sciences, Vol. 1, No. 2-3, 01.01.1999, p. 133-148.

Research output: Contribution to journalArticle

Muraoka, Yuji ; Grenier, J. C. ; Petit, S. ; Pouchard, M. / Preparation of hexagonal MoO3 by "Chimie Douce" reaction with NO2 In: Solid State Sciences. 1999 ; Vol. 1, No. 2-3. pp. 133-148.
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