SnO2 (n)-NiO (p) composite nanowebs: Gas sensing properties and sensing mechanisms
- Authors
- Kim, Jae-Hun; Lee, Jae-Hyoung; Mirzaei, Ali; Kim, Hyoun Woo; Kim, Sang Sub
- Issue Date
- Apr-2018
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- SnO2; NiO; Composite; Nanoweb; Gas sensor
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, v.258, pp.204 - 214
- Indexed
- SCIE
SCOPUS
- Journal Title
- SENSORS AND ACTUATORS B-CHEMICAL
- Volume
- 258
- Start Page
- 204
- End Page
- 214
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/17678
- DOI
- 10.1016/j.snb.2017.11.063
- ISSN
- 0925-4005
- Abstract
- Aiming to optimize SnO2-NiO nanocomposite sensors for detection of hazardous gases, a series of xSnO(2)(1-x) NiO composite nanowebs with different compositions (x = 0.1, 0.3, 0.5, 0.7, and 0.9) were synthesized using an electro spinning process. The formation of long and continuous SnO2-NiO nanowebs was verified. Depending on the composition, xSnO(2)-(1-x) NiO composite nanowebs showed either n-type (SnO2-rich composition) or p-type (NiO-rich composition) gas-sensing behavior. The best sensing performance was obtained for the nanowebs of 0.5SnO(2)-0.5NiO. The presence of plenty of p-n heterojunctions along with the high oxygen adsorption property of NiO were the main reasons for the high response to the NO2 and C6H6 gases at this optimized composition.
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