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Hydrothermal treatment with VO2(B) nanobelts for synthesis of VO2(A) and W doped VO2(M) nanobelts.
- Source :
- Materials Research Innovations; Jun2015, Vol. 19 Issue 4, p295-302, 8p
- Publication Year :
- 2015
-
Abstract
- In this paper, the conversion of VO<subscript>2</subscript>(B) nanobelts under the hydrothermal condition in the absence/presence of dopant was studied. The synthetic conditions, such as the reaction temperature, reaction time, quantity of the dopants and kinds of dopants, were briefly discussed to prepare VO<subscript>2</subscript>(A) and W doped VO<subscript>2</subscript>(M) solid solution. It was found that the dopant played a crucial role in controlling VO<subscript>2</subscript> polymorph, and the results showed that VO<subscript>2</subscript>(A) was obtained in the absence of dopant, whereas W doped VO<subscript>2</subscript>(M) was obtained in the presence of tungstenic acid. The transformation mechanism from VO<subscript>2</subscript>(B) to VO<subscript>2</subscript>(A) and W doped VO<subscript>2</subscript>(M) was discussed in detail. The phase transition temperature ( T<subscript>c</subscript>) of VO<subscript>2</subscript>(A) and W doped VO<subscript>2</subscript>(M) was evaluated by differential scanning calorimetry. It is found that doped atoms can be successfully doped into the crystal lattice of VO<subscript>2</subscript>(M) matrix, and the T<subscript>c</subscript> of W doped VO<subscript>2</subscript>(M) can be reduced by W doping. The optical switching properties were studied by the variable temperature infrared spectra, and it was found that the as obtained VO<subscript>2</subscript>(A) and W doped VO<subscript>2</subscript>(M) had outstanding thermochromic characters and optical switching properties. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14328917
- Volume :
- 19
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Materials Research Innovations
- Publication Type :
- Academic Journal
- Accession number :
- 103033377
- Full Text :
- https://doi.org/10.1179/1433075X15Y.0000000001