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

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44 Citas (Scopus)

Resumen

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.

Idioma original	Inglés
Páginas (desde-hasta)	88-94
Número de páginas	7
Publicación	Materials Science and Engineering B: Solid-State Materials for Advanced Technology
Volumen	135
N.º	2
DOI	https://doi.org/10.1016/j.mseb.2006.08.041
Estado	Publicada - 25 nov. 2006
Publicado de forma externa	Sí

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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,

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

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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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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

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