Glucose-mediated hydrothermal synthesis and gas sensing characteristics of WO3 hollow microspheres

Choong Yong Lee; Sun Jung Kim; In Sung Hwang; Jong Heun Lee

doi:10.1016/j.snb.2009.08.031

Glucose-mediated hydrothermal synthesis and gas sensing characteristics of WO₃ hollow microspheres

Choong Yong Lee, Sun Jung Kim, In Sung Hwang, Jong Heun Lee

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

94 Citations (Scopus)

Abstract

Tungsten-coated carbon microspheres were prepared by one-pot hydrothermal reaction of an aqueous solution containing glucose and sodium tungstate. The spheres were converted into WO₃ hollow microspheres by the decomposition of their core carbon. The [glucose]/[sodium tungstate] ratio of the stock solution determined not only the morphology of the precursors but also the phase of the powders after calcination. The WO₃ hollow microspheres showed a higher gas response and more selective detection of 0.5-2.5 ppm NO₂ than WO₃ solid and nano-porous microspheres did. The enhanced NO₂ sensing characteristics are explained in relation to the surface area, pore volume, and hollow morphology.

Original language	English
Pages (from-to)	236-242
Number of pages	7
Journal	Sensors and Actuators, B: Chemical
Volume	142
Issue number	1
DOIs	https://doi.org/10.1016/j.snb.2009.08.031
Publication status	Published - 2009 Oct 12

Keywords

Carbon template
Hollow microspheres
NO sensor
WO

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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