Combination of Pd loading and electron beam irradiation for superior hydrogen sensing of electrospun ZnO nanofibers
- Authors
- Kim, Jae-Hun; Mirzaei, Ali; Kim, Hyoun Woo; Kim, Sang Sub
- Issue Date
- Apr-2019
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Electron beam irradiation; Pd nanoparticles; ZnO nanofibers; Gas sensors; H-2
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, v.284, pp.628 - 637
- Indexed
- SCIE
SCOPUS
- Journal Title
- SENSORS AND ACTUATORS B-CHEMICAL
- Volume
- 284
- Start Page
- 628
- End Page
- 637
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/14231
- DOI
- 10.1016/j.snb.2018.12.120
- ISSN
- 0925-4005
- Abstract
- We evaluated the hydrogen gas-sensing characteristics of Pd-loaded (0.1, 0.3, 0.6, and 1 wt%) ZnO nanofibers prepared by a facile electrospinning technique and the effect of different electron beam (e-beam) doses (50, 100, and 150 kGy) on sensing performance. The sensor loaded with 0.6 wt% Pd had the highest response to hydrogen among the Pd-loaded sensors. The sensor irradiated with 150 kGy had the high response (R-a/R-g) of 74.7-100 ppb of H-2 at 350 degrees C. Metallization effects in ZnO, the formation of structural defects due to e-beam irradiation, the catalytic activity of Pd, and the presence of ZnO-Pd heterojunctions were the main factors yielding high sensitivity towards H-2. The strategy of combining e-beam irradiation and Pd loading to enhance H-2 sensing can be applied to realize reliable gas sensors and the widespread use of hydrogen as a green energy alternative to fossil fuels.
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