Hexagonal VO2 particles: synthesis, mechanism and thermochromic properties

Hui Yan Xu; Ke Wei Xu; Fei Ma; Paul K. Chu

doi:10.1039/c8ra00716k

Hexagonal VO₂ particles: synthesis, mechanism and thermochromic properties

Hui Yan Xu, Ke Wei Xu, Fei Ma^*, Paul K. Chu^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

12 Citations (Scopus)

46 Downloads (CityUHK Scholars)

Abstract

Monoclinic vanadium dioxide VO₂ (M) with hexagonal structure is synthesized by hydrothermal method, and the phase evolution is evidenced. Interestingly, the hexagonal morphology comes into being as a result of the low-energy coherent interfaces, (211)₁//(211)₂ and (211)₁//(020)₂. The size of hexagonal particles is well controlled by changing the concentration of precursor solutions. Hexagonal particles exhibit excellent thermochromic properties with a narrow hysteresis of 5.9 °C and high stability. In addition, the phase transition temperature can be substantially reduced down to 28 °C by simply W doping.

Original language	English
Pages (from-to)	10064-10071
Journal	RSC Advances
Volume	8
Issue number	18
Online published	12 Mar 2018
DOIs	https://doi.org/10.1039/c8ra00716k
Publication status	Published - 2018

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This full text is made available under CC-BY-NC 3.0. https://creativecommons.org/licenses/by-nc/3.0/

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abstract = "Monoclinic vanadium dioxide VO2 (M) with hexagonal structure is synthesized by hydrothermal method, and the phase evolution is evidenced. Interestingly, the hexagonal morphology comes into being as a result of the low-energy coherent interfaces, (211)1//(211)2 and (211)1//(020)2. The size of hexagonal particles is well controlled by changing the concentration of precursor solutions. Hexagonal particles exhibit excellent thermochromic properties with a narrow hysteresis of 5.9 °C and high stability. In addition, the phase transition temperature can be substantially reduced down to 28 °C by simply W doping.",

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AB - Monoclinic vanadium dioxide VO2 (M) with hexagonal structure is synthesized by hydrothermal method, and the phase evolution is evidenced. Interestingly, the hexagonal morphology comes into being as a result of the low-energy coherent interfaces, (211)1//(211)2 and (211)1//(020)2. The size of hexagonal particles is well controlled by changing the concentration of precursor solutions. Hexagonal particles exhibit excellent thermochromic properties with a narrow hysteresis of 5.9 °C and high stability. In addition, the phase transition temperature can be substantially reduced down to 28 °C by simply W doping.

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