<abstract xmlns="http://www.w3.org/1999/xhtml">Vanadium dioxide VO2 has been paid in recent years increasing attention because of its various applications, however, its oxidation resistance properties in air atmosphere have rarely been reported. Herein, VO2(B) nanobelts were transformed into VO2(A) and VO2(M) nanobelts by hydrothermal route and calcination treatment, respectively. Then, we comparatively studied the oxidation resistance properties of VO2(B), VO2(A) and VO2(M) nanobelts in air atmosphere by thermo-gravimetric analysis and differential thermal analysis (TGA/DTA). It was found that the nanobelts had good thermal stability and oxidation resistance below 341 °C, 408 °C and 465 °C in air, respectively, indicating that they were stable in air at room temperature. The fierce oxidation of the nanobelts occurred at 426, 507 and 645 °C, respectively. The results showed that the VO2(M) nanobelts had the best thermal stability and oxidation resistance among the others. Furthermore, the phase transition temperatures and optical switching properties of VO2(A) and VO2(M) were studied by differential scanning calorimetry (DSC) and variable temperature infrared spectra. It was found that the VO2(A) and VO2(M) nanobelts had outstanding thermochromic character and optical switching properties.</abstract>

Vanadium dioxide VO2 has been paid in recent years increasing attention because of its various applications, however, its oxidation resistance properties in air atmosphere have rarely been reported. Herein, VO2(B) nanobelts were transformed into VO2(A) and VO2(M) nanobelts by hydrothermal route and calcination treatment, respectively. Then, we comparatively studied the oxidation resistance properties of VO2(B), VO2(A) and VO2(M) nanobelts in air atmosphere by thermo-gravimetric analysis and differential thermal analysis (TGA/DTA). It was found that the nanobelts had good thermal stability and oxidation resistance below 341 °C, 408 °C and 465 °C in air, respectively, indicating that they were stable in air at room temperature. The fierce oxidation of the nanobelts occurred at 426, 507 and 645 °C, respectively. The results showed that the VO2(M) nanobelts had the best thermal stability and oxidation resistance among the others. Furthermore, the phase transition temperatures and optical switching properties of VO2(A) and VO2(M) were studied by differential scanning calorimetry (DSC) and variable temperature infrared spectra. It was found that the VO2(A) and VO2(M) nanobelts had outstanding thermochromic character and optical switching properties.

VO2(B) conversion to VO2(A) and VO2(M) and their oxidation resistance and optical switching properties

School of Chemistry, Dalian University of Technology, Dalian 116024, PR

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

VO(B) conversion to VO(A) and VO(M) and their oxidation resistance and optical switching properties

Vanadium dioxide VO2 has been paid in recent years increasing attention because of its various applications, however, its oxidation resistance properties in...

Phase	T_c [°C] T_c: phase transition temperature; Cs: Crystal system; Sg: Space group.	Cs T_c: phase transition temperature; Cs: Crystal system; Sg: Space group.	Sg T_c: phase transition temperature; Cs: Crystal system; Sg: Space group.	a [Å]	b [Å]	c [Å]	β (°)	Ref.
VO₂(B)	—	Monoclinic	C2/m	12.03	3.693	6.420	106.6	[17]
VO₂(M)	68	Monoclinic	P2₁/c	5.743	4.157	5.375	122.6	[18]
VO₂(R)	68	Tetragonal	P4₂/mnm	4.530	4.530	2.869	—	[19]
VO₂(AL)	162	Tetragonal	P4/ncc	8.440	8.440	7.666	—	[20]
VO₂(AH)	162	Tetragonal	I4/m	8.476	8.476	3.824	—	[20]

VO₂(B) conversion to VO₂(A) and VO₂(M) and their oxidation resistance and optical switching properties

Article Category: Research Article

Publicado en línea: 27 abr 2016

Páginas: 169 - 176

Recibido: 01 oct 2015

Aceptado: 12 dic 2015

DOI: https://doi.org/10.1515/msp-2016-0023

Palabras clave

© 2016 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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The crystallography data of some important types of VO2 polymorph.