Thermochromic Properties of VO2 Hollow Spheres Composed of Nanosheets

Research output: Conference Papers (RGC: 31A, 31B, 32, 33)32_Refereed conference paper (no ISBN/ISSN)peer-review

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Author(s)

Detail(s)

Original languageEnglish
Publication statusPublished - Nov 2018

Conference

Title2nd International Conference on Advanced Functional Materials & Interfaces (AFMI 2018)
PlaceChina
CityWuhan
Period1 - 5 November 2018

Abstract

Vanadium dioxide (VO2) as a phase-transition material exhibit great potential in the field of smart windows for energy saving. Herein, hollow spheres with VO2 nanosheets vertically distributed on the surface are synthesized via a template-free hydrothermal method. The dispersion and optical properties are greatly improved due to that the nanosheets are separated and uniformly arranged on the spheres. Compared with the aggregated one, the visible transmittance (Tvis) and the solar modulation (ΔTsol) are improved from 33% to 50% and from 5.2% to 11.2%, respectively. Meanwhile, a large contrast transmittance of 60% at 2500 nm is obtained. The optical properties are more balanced that Tvis increases with gently reduction of ΔTsol as the film thickness is reduced. Furthermore, the as-obtained VO2 exhibits higher sensitivity than that of VO2 nanoparticles, owing to the 2D-structure of nanosheets. This work demonstrates a promising 2D structure to promote the practical applications in smart windows.

Bibliographic Note

Research Unit(s) information for this publication is provided by the author(s) concerned.

Citation Format(s)

Thermochromic Properties of VO2 Hollow Spheres Composed of Nanosheets. / Xu, Huiyan; Ma, Fei; Chu, Paul K.

2018. Paper presented at 2nd International Conference on Advanced Functional Materials & Interfaces (AFMI 2018), Wuhan, China.

Research output: Conference Papers (RGC: 31A, 31B, 32, 33)32_Refereed conference paper (no ISBN/ISSN)peer-review