Amorphous-crystalline transition studied in hydrated MoO3

M. A. Camacho-López; E. Haro-Poniatowski; L. Lartundo-Rojas; J. Livage; C. M. Julien

doi:10.1016/j.mseb.2006.08.041

Amorphous-crystalline transition studied in hydrated MoO₃

M. A. Camacho-López, E. Haro-Poniatowski, L. Lartundo-Rojas, J. Livage, C. M. Julien

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

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Abstract

In this work we study the thermal behavior of hydrated MoO₃ synthesized via acidification of sodium molybdate. MoO₃·nH₂O (n = 1.4) amorphous compound was heated in air at increasing temperatures in order to obtain the crystalline MoO₃ phase. We have studied the structural changes as a function of annealing temperature by Raman spectroscopy. A statistical study to determine the average size of the crystallites at each annealing step has been realized by scanning electron microscopy. Results show that the hydrated MoO₃·1.4H₂O glass transforms in an amorphous MoO₃·0.7H₂O phase prior to its crystallization, while the sample heated at 500 °C crystallizes into the orthorhombic α-MoO₃ phase with micro-crystallites having an average size of 6.8 μm.

Original language	English
Pages (from-to)	88-94
Number of pages	7
Journal	Materials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume	135
Issue number	2
DOIs	https://doi.org/10.1016/j.mseb.2006.08.041
State	Published - 25 Nov 2006
Externally published	Yes

Keywords

Molybdenum trioxide
Phase transition
Raman spectroscopy

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title = "Amorphous-crystalline transition studied in hydrated MoO3",

abstract = "In this work we study the thermal behavior of hydrated MoO3 synthesized via acidification of sodium molybdate. MoO3·nH2O (n = 1.4) amorphous compound was heated in air at increasing temperatures in order to obtain the crystalline MoO3 phase. We have studied the structural changes as a function of annealing temperature by Raman spectroscopy. A statistical study to determine the average size of the crystallites at each annealing step has been realized by scanning electron microscopy. Results show that the hydrated MoO3·1.4H2O glass transforms in an amorphous MoO3·0.7H2O phase prior to its crystallization, while the sample heated at 500 °C crystallizes into the orthorhombic α-MoO3 phase with micro-crystallites having an average size of 6.8 μm.",

keywords = "Molybdenum trioxide, Phase transition, Raman spectroscopy",

author = "Camacho-L{\'o}pez, {M. A.} and E. Haro-Poniatowski and L. Lartundo-Rojas and J. Livage and Julien, {C. M.}",

note = "Funding Information: One of us (EHP) thanks the support of the Consejo Nacional de Ciencia y Tecnolog{\'i}a CONACYT and the Universidad Aut{\'o}noma Metropolitana Iztaplapa of M{\'e}xico.",

year = "2006",

month = nov,

day = "25",

doi = "10.1016/j.mseb.2006.08.041",

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pages = "88--94",

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TY - JOUR

T1 - Amorphous-crystalline transition studied in hydrated MoO3

AU - Camacho-López, M. A.

AU - Haro-Poniatowski, E.

AU - Lartundo-Rojas, L.

AU - Livage, J.

AU - Julien, C. M.

N1 - Funding Information: One of us (EHP) thanks the support of the Consejo Nacional de Ciencia y Tecnología CONACYT and the Universidad Autónoma Metropolitana Iztaplapa of México.

PY - 2006/11/25

Y1 - 2006/11/25

N2 - In this work we study the thermal behavior of hydrated MoO3 synthesized via acidification of sodium molybdate. MoO3·nH2O (n = 1.4) amorphous compound was heated in air at increasing temperatures in order to obtain the crystalline MoO3 phase. We have studied the structural changes as a function of annealing temperature by Raman spectroscopy. A statistical study to determine the average size of the crystallites at each annealing step has been realized by scanning electron microscopy. Results show that the hydrated MoO3·1.4H2O glass transforms in an amorphous MoO3·0.7H2O phase prior to its crystallization, while the sample heated at 500 °C crystallizes into the orthorhombic α-MoO3 phase with micro-crystallites having an average size of 6.8 μm.

AB - In this work we study the thermal behavior of hydrated MoO3 synthesized via acidification of sodium molybdate. MoO3·nH2O (n = 1.4) amorphous compound was heated in air at increasing temperatures in order to obtain the crystalline MoO3 phase. We have studied the structural changes as a function of annealing temperature by Raman spectroscopy. A statistical study to determine the average size of the crystallites at each annealing step has been realized by scanning electron microscopy. Results show that the hydrated MoO3·1.4H2O glass transforms in an amorphous MoO3·0.7H2O phase prior to its crystallization, while the sample heated at 500 °C crystallizes into the orthorhombic α-MoO3 phase with micro-crystallites having an average size of 6.8 μm.

KW - Molybdenum trioxide

KW - Phase transition

KW - Raman spectroscopy

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U2 - 10.1016/j.mseb.2006.08.041

DO - 10.1016/j.mseb.2006.08.041

M3 - Artículo

SN - 0921-5107

VL - 135

SP - 88

EP - 94

JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology

JF - Materials Science and Engineering B: Solid-State Materials for Advanced Technology

IS - 2

ER -

Amorphous-crystalline transition studied in hydrated MoO₃

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Keywords

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