Thermochromic VO2-SiO2composite coating from ammonium citrato-oxovanadate(IV)

Jing Zhang; Tengfei Wang; Weiwei Xu; Xiaohui Yang; Xiaoling Zuo; Weiwei Cheng; Chaobiao Zhou

doi:10.1088/1361-6528/abe43a

Thermochromic VO₂-SiO₂composite coating from ammonium citrato-oxovanadate(IV)

Nanotechnology. 2021 Mar 9;32(22). doi: 10.1088/1361-6528/abe43a.

Authors

Jing Zhang¹, Tengfei Wang¹, Weiwei Xu², Xiaohui Yang¹, Xiaoling Zuo¹, Weiwei Cheng³, Chaobiao Zhou²

Affiliations

¹ School of Materials Science and Engineering, Guizhou Minzu University, Guiyang 550025, People's Republic of China.
² College of Mechanical and Electronic Engineering, Guizhou Minzu University, Guiyang 550025, People's Republic of China.
³ School of Information Science and Technology, Zhejiang Sci-Tech University, Hangzhou, 310018, People's Republic of China.

PMID: 33556930
DOI: 10.1088/1361-6528/abe43a

Abstract

Vanadium dioxide (VO₂) coating plays an important role in energy saving and environmental protection due to its unique reversible phase transition. To solve the daylighting issue of VO₂coating, a VO₂(M)-silicon dioxide (SiO₂) composite coating is fabricated from ammonium citrato-oxovanadate(IV) by a SiO₂-assisted coating method. The VO₂(M)-SiO₂composite coating possesses excellent thermochromic properties that have produced varying results, i.e. 49.2% of visible transmittance, 52.3% of transmittance reduction at 2000 nm wavelength, 12% of solar energy modulation (ΔT_sol) and a phase transition temperature of 56.0 °C. Our findings may pave the way to extending the large-scale application of smart windows based on thermochromic VO₂.

Keywords: composite coating; monoclinic vanadium dioxide; silicon dioxide; smart window; thermochromic material.