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)

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1166/nnl.2016.2065

Cite this

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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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