Hydrothermal treatment with VO2(B) nanobelts for synthesis of VO2(A) and W doped VO2(M) nanobelts. (April 2015)

• Record Type: Journal Article
• Authors: Zhang, Y.; Tan, X.; Huang, C.; Meng, C.
• Is Part Of: Materials research innovations. Volume 19(2015)Supplement 7
• Page Start: 295
• Page End: 302
• Publication Date: 2015-04
• Subjects: Materials -- Research -- Periodicals; Matériaux -- Recherche -- Périodiques; 620.1105
• DOI: 10.1179/1433075X15Y.0000000001
• Languages: German
• ISSNs: 1432-8917

Abstract

<abstract> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <p>In this paper, the conversion of VO₂(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 VO₂(A) and W doped VO₂(M) solid solution. It was found that the dopant played a crucial role in controlling VO₂ polymorph, and the results showed that VO₂(A) was obtained in the absence of dopant, whereas W doped VO₂(M) was obtained in the presence of tungstenic acid. The transformation mechanism from VO₂(B) to VO₂(A) and W doped VO₂(M) was discussed in detail. The phase transition temperature (<italic>T</italic>_c) of VO₂(A) and W doped VO₂(M) was evaluated by differential scanning calorimetry. It is found that doped atoms can be successfully doped into the crystal lattice of VO₂(M) matrix, and the <italic>T</italic>_c of W doped VO₂(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 VO₂(A) and W doped VO₂(M) had outstanding thermochromic characters and optical switching properties.</p> </abstract>