Enhanced oxidation stability of VO2 by Coating SiO2 layer for smart window applications

Jee Hye Shin; Hee Jung Kim; Ki Bong Lee; Jung Whan Yoo

doi:10.1166/nnl.2016.2065

Enhanced oxidation stability of VO₂ by Coating SiO₂ layer for smart window applications

Jee Hye Shin, Hee Jung Kim, Ki Bong Lee, Jung Whan Yoo

Department of Chemical and Biological Engineering

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

SiO₂-coated W-VO₂(M) nanoparticles were synthesized by a precipitation method and then modified with tetraethylorthosilicate as a precursor using the Stöber process, to enhance oxidation stability. W-VO₂(M) nanoparticles were uniformly coated with a SiO₂ layer approximately 25 nm in thickness. Based on XRD and DSC characterization, the crystal structure and phase transition temperature of SiO₂-coated W-VO₂(M) are almost the same as before SiO₂ coating. Upon exposure to 80% water vapor pressure at 80 C, the coated nanoparticles maintain their structure, phase transition temperature, and morphology for a longtime compared to uncoated W-VO₂(M) particles, and show improved oxidation stability.

Original language	English
Pages (from-to)	510-513
Number of pages	4
Journal	Nanoscience and Nanotechnology Letters
Volume	8
Issue number	6
DOIs	https://doi.org/10.1166/nnl.2016.2065
Publication status	Published - 2016 Jun 1

Keywords

Core-Shell Structure
Energy Efficiency
Oxidation Stability
Phase Transition Nanoparticle
Vanadium Dioxide

ASJC Scopus subject areas

Materials Science(all)

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title = "Enhanced oxidation stability of VO2 by Coating SiO2 layer for smart window applications",

abstract = "SiO2-coated W-VO2(M) nanoparticles were synthesized by a precipitation method and then modified with tetraethylorthosilicate as a precursor using the St{\"o}ber process, to enhance oxidation stability. W-VO2(M) nanoparticles were uniformly coated with a SiO2 layer approximately 25 nm in thickness. Based on XRD and DSC characterization, the crystal structure and phase transition temperature of SiO2-coated W-VO2(M) are almost the same as before SiO2 coating. Upon exposure to 80% water vapor pressure at 80 C, the coated nanoparticles maintain their structure, phase transition temperature, and morphology for a longtime compared to uncoated W-VO2(M) particles, and show improved oxidation stability.",

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AU - Shin, Jee Hye

AU - Kim, Hee Jung

AU - Lee, Ki Bong

AU - Yoo, Jung Whan

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Y1 - 2016/6/1

N2 - SiO2-coated W-VO2(M) nanoparticles were synthesized by a precipitation method and then modified with tetraethylorthosilicate as a precursor using the Stöber process, to enhance oxidation stability. W-VO2(M) nanoparticles were uniformly coated with a SiO2 layer approximately 25 nm in thickness. Based on XRD and DSC characterization, the crystal structure and phase transition temperature of SiO2-coated W-VO2(M) are almost the same as before SiO2 coating. Upon exposure to 80% water vapor pressure at 80 C, the coated nanoparticles maintain their structure, phase transition temperature, and morphology for a longtime compared to uncoated W-VO2(M) particles, and show improved oxidation stability.

AB - SiO2-coated W-VO2(M) nanoparticles were synthesized by a precipitation method and then modified with tetraethylorthosilicate as a precursor using the Stöber process, to enhance oxidation stability. W-VO2(M) nanoparticles were uniformly coated with a SiO2 layer approximately 25 nm in thickness. Based on XRD and DSC characterization, the crystal structure and phase transition temperature of SiO2-coated W-VO2(M) are almost the same as before SiO2 coating. Upon exposure to 80% water vapor pressure at 80 C, the coated nanoparticles maintain their structure, phase transition temperature, and morphology for a longtime compared to uncoated W-VO2(M) particles, and show improved oxidation stability.

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