Physicochemical and textural characterization of vanadium-magnesium mixed oxides

L. Balderas-Tapia; J. A. Wang; I. Hernández-Pérez; G. G. Aguilar-Ríos; P. Schacht

doi:10.1016/j.matlet.2004.05.036

Physicochemical and textural characterization of vanadium-magnesium mixed oxides

L. Balderas-Tapia, J. A. Wang, I. Hernández-Pérez, G. G. Aguilar-Ríos, P. Schacht

Escuela Superior de Ingeniería Química e Industrias Extractivas (ESIQIE)

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

20 Scopus citations

Abstract

A series of vanadium-magnesium mixed oxides (V-Mg-O) with a mesoporous structure used for the propane oxidative dehydrogenation was synthesized by combining the impregnation and precipitation methods. Several techniques such as N₂ physisorption, X-ray diffraction (XRD), FTIR and temperature-programmed reduction (TPR) were applied to characterize the textural properties, phase composition and surface oxygen reduction features of the oxides. Textural properties of the calcined V-Mg-O oxides were found very sensitive to chemical composition: bimodal or multimodal pore size distributions was developed, which progressively varied with vanadium content. XRD analysis and infrared (IR) characterization confirm that the V-Mg-O oxides consist of a Mg₃V₂O₈ structure with VO₄ tetrahedral units together with periclase phase. Magnesium incorporation with vanadium completely inhibits the formation of V₂O₅ containing exposed V=O bonds. TPR results showed two peaks located between 500 and 750 °C, corresponding to the reduction of V⁵⁺ species in distorted VO₄ units and to V⁵⁺ species belonging to bulk Mg orthovanadate, respectively.

Original language	English
Pages (from-to)	3034-3039
Number of pages	6
Journal	Materials Letters
Volume	58
Issue number	24
DOIs	https://doi.org/10.1016/j.matlet.2004.05.036
State	Published - Sep 2004

Keywords

Mesoporous materials
Mg VO
Textural properties
V-Mg-O catalysts

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10.1016/j.matlet.2004.05.036

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title = "Physicochemical and textural characterization of vanadium-magnesium mixed oxides",

abstract = "A series of vanadium-magnesium mixed oxides (V-Mg-O) with a mesoporous structure used for the propane oxidative dehydrogenation was synthesized by combining the impregnation and precipitation methods. Several techniques such as N2 physisorption, X-ray diffraction (XRD), FTIR and temperature-programmed reduction (TPR) were applied to characterize the textural properties, phase composition and surface oxygen reduction features of the oxides. Textural properties of the calcined V-Mg-O oxides were found very sensitive to chemical composition: bimodal or multimodal pore size distributions was developed, which progressively varied with vanadium content. XRD analysis and infrared (IR) characterization confirm that the V-Mg-O oxides consist of a Mg3V2O8 structure with VO4 tetrahedral units together with periclase phase. Magnesium incorporation with vanadium completely inhibits the formation of V2O5 containing exposed V=O bonds. TPR results showed two peaks located between 500 and 750 °C, corresponding to the reduction of V5+ species in distorted VO4 units and to V5+ species belonging to bulk Mg orthovanadate, respectively.",

keywords = "Mesoporous materials, Mg VO, Textural properties, V-Mg-O catalysts",

author = "L. Balderas-Tapia and Wang, {J. A.} and I. Hern{\'a}ndez-P{\'e}rez and Aguilar-R{\'i}os, {G. G.} and P. Schacht",

note = "Funding Information: L. Balderas-Tapia would like to thank the financial support from CONACyT of Mexico, for his doctoral study at the Universidad Aut{\'o}noma Metropolitana-Azcapotzalco, Mexico. The authors greatly appreciate Dr. L.E. Nore{\~n}a for proofreading the manuscript. ",

year = "2004",

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AU - Balderas-Tapia, L.

AU - Wang, J. A.

AU - Hernández-Pérez, I.

AU - Aguilar-Ríos, G. G.

AU - Schacht, P.

N1 - Funding Information: L. Balderas-Tapia would like to thank the financial support from CONACyT of Mexico, for his doctoral study at the Universidad Autónoma Metropolitana-Azcapotzalco, Mexico. The authors greatly appreciate Dr. L.E. Noreña for proofreading the manuscript.

PY - 2004/9

Y1 - 2004/9

N2 - A series of vanadium-magnesium mixed oxides (V-Mg-O) with a mesoporous structure used for the propane oxidative dehydrogenation was synthesized by combining the impregnation and precipitation methods. Several techniques such as N2 physisorption, X-ray diffraction (XRD), FTIR and temperature-programmed reduction (TPR) were applied to characterize the textural properties, phase composition and surface oxygen reduction features of the oxides. Textural properties of the calcined V-Mg-O oxides were found very sensitive to chemical composition: bimodal or multimodal pore size distributions was developed, which progressively varied with vanadium content. XRD analysis and infrared (IR) characterization confirm that the V-Mg-O oxides consist of a Mg3V2O8 structure with VO4 tetrahedral units together with periclase phase. Magnesium incorporation with vanadium completely inhibits the formation of V2O5 containing exposed V=O bonds. TPR results showed two peaks located between 500 and 750 °C, corresponding to the reduction of V5+ species in distorted VO4 units and to V5+ species belonging to bulk Mg orthovanadate, respectively.

AB - A series of vanadium-magnesium mixed oxides (V-Mg-O) with a mesoporous structure used for the propane oxidative dehydrogenation was synthesized by combining the impregnation and precipitation methods. Several techniques such as N2 physisorption, X-ray diffraction (XRD), FTIR and temperature-programmed reduction (TPR) were applied to characterize the textural properties, phase composition and surface oxygen reduction features of the oxides. Textural properties of the calcined V-Mg-O oxides were found very sensitive to chemical composition: bimodal or multimodal pore size distributions was developed, which progressively varied with vanadium content. XRD analysis and infrared (IR) characterization confirm that the V-Mg-O oxides consist of a Mg3V2O8 structure with VO4 tetrahedral units together with periclase phase. Magnesium incorporation with vanadium completely inhibits the formation of V2O5 containing exposed V=O bonds. TPR results showed two peaks located between 500 and 750 °C, corresponding to the reduction of V5+ species in distorted VO4 units and to V5+ species belonging to bulk Mg orthovanadate, respectively.

KW - Mesoporous materials

KW - Mg VO

KW - Textural properties

KW - V-Mg-O catalysts

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DO - 10.1016/j.matlet.2004.05.036

M3 - Artículo

SN - 0167-577X

VL - 58

SP - 3034

EP - 3039

JO - Materials Letters

JF - Materials Letters

IS - 24

ER -

Physicochemical and textural characterization of vanadium-magnesium mixed oxides

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Keywords

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