Glucose-mediated hydrothermal synthesis and gas sensing characteristics of WO3 hollow microspheres
- Authors
- Lee, Choong-Yong; Kim, Sun-Jung; Hwang, In-Sung; Lee, Jong-Heun
- Issue Date
- 12-10월-2009
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- WO3; NO2 sensor; Hollow microspheres; Carbon template
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, v.142, no.1, pp.236 - 242
- Indexed
- SCIE
SCOPUS
- Journal Title
- SENSORS AND ACTUATORS B-CHEMICAL
- Volume
- 142
- Number
- 1
- Start Page
- 236
- End Page
- 242
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/119117
- DOI
- 10.1016/j.snb.2009.08.031
- ISSN
- 0925-4005
- 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 0.5-2.5ppm 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. (C) 2009 Elsevier B. V. All rights reserved.
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