Mechanism Study of ZnO Nanorod-Bundle Sensors for H2S Gas Sensing
SCIE
SCOPUS
- Title
- Mechanism Study of ZnO Nanorod-Bundle Sensors for H2S Gas Sensing
- Authors
- Kim, J; Yong, K
- Date Issued
- 2011-04-21
- Publisher
- AMER CHEMICAL SOC
- Abstract
- This work reports the H2S gas-sensing properties of ZnO nanorod bundles and an investigation of their gas sensing mechanism. A one-dimensional ZnO nanostructure was synthesized using the hydrothermal method; scanning electron microscopy (SEM); and X-ray diffraction (XRD) spectra confirmed that the structures. A furnace type gas sensing properties in air containing dilute H2S gas (50 ppm) at sensing temperatures T-s <= 500 degrees C. The response of ZnO nanorod-bundle sensors to H2S gas increased with T-s; this trend may be due to chemical reaction of nanorods with gas molecules. X-ray photoelectron spectroscopy results indicated that the sensing mechanism of the ZnO nanorod-bundle sensor was explained by both the well-known surface reaction between H2S and adsorbed oxygen on ZnO, and the formation of zinc-sulfur bonding in ZnO nanorods, which becomes a dominant sensing mechanism at high T-s above 300 degrees C.
- Keywords
- LOW-TEMPERATURE SYNTHESIS; OXIDE THIN-FILMS; OPTICAL-PROPERTIES; CVD METHOD; FABRICATION; CHEMISTRY; ARRAYS; NANOSTRUCTURES; PHOTOEMISSION; SULFIDATION
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/17456
- DOI
- 10.1021/JP110129F
- ISSN
- 1932-7447
- Article Type
- Article
- Citation
- JOURNAL OF PHYSICAL CHEMISTRY C, vol. 115, no. 15, page. 7218 - 7224, 2011-04-21
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