Fig. 1. Preparation process of VO₂@SiO₂

Fig. 2. XRD patterns of VO（OH）₂@SiO₂ after heat treatment at different temperatures for 30 minutes

Fig. 3. TEM images of VO（OH）₂， VO（OH）₂@SiO₂， VO₂@SiO₂ and HRTEM images of VO₂@SiO₂

Fig. 4. STEM images of Nanoparticles， and element mapping of V， Si， and V+Si

Fig. 5. ΔT_sol-T_vis curves of composite films containing different mass fractions of nanoparticles

Fig. 6. Transmittance curves of film at different temperatures ， parameters derived from hysteresis loops and the derivative of film at wavelength of 1500 nm during heating and cooling processes

Fig. 7. XRD patterns of VO₂ and VO₂@SiO₂ after damp heating treatment

Fig. 8. Transmittance curves of film prepared byVO₂ and VO₂@SiO₂ at different temperatures after damp heating treatment

Fig. 9. VO₂ and VO₂@SiO₂ over time images in a solution of hydrochloric acid at pH 1

Fig. 10. Temperature curves of model houses with and without VO₂@SiO₂ thermochromic film