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http://dx.doi.org/10.3740/MRSK.2018.28.8.466

Fabrication and H2S Sensing Property of Nickel Oxide and Nickel Oxide-Carbon Nanotube Composite  

Yang, Haneul (Department of Materials Science and Engineering, Chungnam National University)
Chinh, Ngyuen Duc (Department of Materials Science and Engineering, Chungnam National University)
Hieu, Ngyuen Minh (Department of Materials Science and Engineering, Chungnam National University)
Park, Jihwan (Department of Materials Science and Engineering, Chungnam National University)
Hong, Soonhyun (Department of Materials Science and Engineering, Chungnam National University)
yun, Hongkwan (Department of Materials Science and Engineering, Chungnam National University)
Kim, Chunjoong (Department of Materials Science and Engineering, Chungnam National University)
Kim, Dojin (Department of Materials Science and Engineering, Chungnam National University)
Publication Information
Korean Journal of Materials Research / v.28, no.8, 2018 , pp. 466-473 More about this Journal
Abstract
Nickel oxide(NiO) thin films, nanorods, and carbon nanotube(CNT)/NiO core-shell nanorod structures are fabricated by sputtering Nickel at different deposition time on alumina substrates or single wall carbon nanotube templates followed by oxidation treatments at different temperatures, 400 and $700^{\circ}C$. Structural analyses are carried out by scanning electron microscopy and x-ray diffraction. NiO thinfilm, nanorod and CNT/NiO core-shell nanorod structurals of the gas sensor structures are tested for detection of $H_2S$ gas. The NiO structures exhibit the highest response at $200^{\circ}C$ and high selectivity to $H_2S$ among other gases of NO, $NH_3$, $H_2$, CO, etc. The nanorod structures have a higher sensing performance than the thin films and carbon nanotube/NiO core-shell structures. The gold catalyst deposited on NiO nanorods further improve the sensing performance, particularly the recovery kinetics.
Keywords
carbon nanotube; nickel oxide; $H_2S$;
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