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Thermochromic VO2-SiO2composite coating from ammonium citrato-oxovanadate(IV)
Jing Zhang1, Tengfei Wang1, Weiwei Xu2
1School of Materials Science and Engineering, Guizhou Minzu University, Guiyang 550025, People's Republic of China.
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) 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.
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