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Effect of Oxalic Acid and Temperature on Hydrothermal VO2 (B) Transformation to VO2 (M)

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Abstract:

The thermochromic vanadium dioxide was successfully synthesized by thermal treatment of a metastable VO2 (B) prepared by hydrothermal process at 180 °C for 48 h with oxalic acid in nitrogen atmosphere. Both annealing temperature and amount of oxalic acid have an effect on phase transformation of VO2 (B) to VO2 (M). Various techniques such as SEM, XRD and DSC were used to characterize the morphology, phase composition, and phase transition temperature, respectively. The transformation of VO2 (B) to VO2(R) increased with an increase in treatment temperature. Moreover, the addition of oxalic acid in heating process exhibited completely transformation of VO2 (B) to VO2 (M).

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Periodical:

Advanced Materials Research (Volumes 785-786)

Pages:

335-338

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.785-786.335

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Online since:

September 2013

Authors:

Phongsatorn Kumbour*, Lek Sikong

Keywords:

Metastable VO2 (B), Monoclinic Vanadium Dioxide, Tetragonal Vanadium Dioxide

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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