Enhanced ethanol gas sensing properties of SnO2 nanobelts functionalized with Au
- Authors
- Jin, Changhyun; Kim, Hyunsu; Park, Sunghoon; Kim, Hyoun Woo; Lee, Sangmin; Lee, Chongmu
- Issue Date
- Dec-2012
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Powders; Electron microscopy; Sensors; gas phase reaction
- Citation
- CERAMICS INTERNATIONAL, v.38, no.8, pp.6585 - 6590
- Indexed
- SCIE
SCOPUS
- Journal Title
- CERAMICS INTERNATIONAL
- Volume
- 38
- Number
- 8
- Start Page
- 6585
- End Page
- 6590
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/164034
- DOI
- 10.1016/j.ceramint.2012.05.043
- ISSN
- 0272-8842
- Abstract
- SnO2 nanobelts functionalized with Au were prepared using a three-step process consisting of the thermal evaporation of Sn powders, sputter deposition of Au, and annealing. Multiple-networked sensors were fabricated using Au-functionalized SnO2 nanobelts. Scanning electron microscopy revealed nanobelts with widths ranging from a few hundred nanometers to a few micrometers, thicknesses of a few hundred nanometers, and lengths ranging from a few to a few tens of micrometers coated with the Au nanoparticles with a mean diameter of 200 nm. The bare SnO2 nanobelts showed responses of 2.80 and 2.20% to C2H5OH concentrations of 50 and 100 ppm, respectively. In contrast, the Au-functionalized SnO2 nanobelts showed responses of 313.25 and 194.77%, respectively, to the same C2H5OH concentrations. Furthermore, SnO2 nanobelts functionalized with Au showed a higher response than those functionalized with other metal catalysts, such as Pd, Pt and Ag. Both the response and recovery times of the SnO2 nanobelts were decreased slightly by Au-functionalization regardless of the C2H5OH concentration. In addition, this paper discusses the enhanced sensing properties of SnO2 nanobelts functionalized with Au.
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