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

Y. Muraoka; J. C. Grenier; S. Petit; M. Pouchard

doi:10.1016/S1293-2558(00)80070-9

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

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

Research output: Contribution to journal › Article › peer-review

43 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 language	English
Pages (from-to)	133-148
Number of pages	16
Journal	Solid State Sciences
Volume	1
Issue number	2-3
DOIs	https://doi.org/10.1016/S1293-2558(00)80070-9
Publication status	Published - Jan 1 1999
Externally published	Yes

ASJC Scopus subject areas

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

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Cite this

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title = "Preparation of hexagonal MoO3 by {"}Chimie Douce{"} reaction with NO2",

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) {\AA} and c = 3.719(1) {\AA}. 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.",

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T1 - Preparation of hexagonal MoO3 by "Chimie Douce" reaction with NO2

AU - Muraoka, Y.

AU - Grenier, J. C.

AU - Petit, S.

AU - Pouchard, M.

PY - 1999/1/1

Y1 - 1999/1/1

N2 - 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.

AB - 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.

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

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