4.7 Article

VO2(M)@SnO2 core-shell nanoparticles: Improved chemical stability and thermochromic property rendered by SnO2 shell

Journal

APPLIED SURFACE SCIENCE
Volume 598, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.apsusc.2022.153741

Keywords

Vanadium dioxide; Tin oxide shell; Solar modulation; Stability

Funding

  1. National Science Foundation of China [51972029, 51572027]

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In this study, core-shell VO2(M)@SnO2 nanoparticles were synthesized to improve the oxidation stability and near-infrared modulation ability. The results demonstrate the promising application of VO2(M)@SnO2 nanoparticles in flexible smart windows.
Vanadium dioxide (VO2) has been extensively studied as a thermochromic material for smart windows. However, the poor oxidation stability of VO2 hinders its practical applications. In this paper, to improve the oxidation stability of VO2, the core-shell VO2(M)@SnO2 nanoparticles are synthesized by a solvothermal method. The chemical stability experiments indicate that the SnO2 coating effectively protects VO2 nanoparticles from acid corrosion and oxidation. Moreover, the core-shell structure is proved to enhance the near-infrared modulation ability (delta TNIR) without impairing the visible light transmittance by both experiments and calculations. The results suggest the promising application of VO2(M)@SnO2 nanoparticles in flexible smart windows and demon-strate that the inorganic optical coating is an effective way in enhancing durability and solar modulation ability of VO2 nanoparticles.

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