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http://dx.doi.org/10.5695/JKISE.2016.49.1.69

Improved Ethanol Gas Sensing Performance of α-Fe2O3 Nanoparticles by the Addition of NiO Nanoparticles  

Park, Sunghoon (Department of Materials Science & Engineering, Inha University)
Kang, Wooseung (Department of Metallurgical & Materials Engineering, Inha Technical College)
Publication Information
Journal of the Korean institute of surface engineering / v.49, no.1, 2016 , pp. 69-74 More about this Journal
Abstract
In order to investigate the effect of NiO on the ethanol gas sensing performance of ${\alpha}-Fe_2O_3$ nanoparticles, NiO and ${\alpha}-Fe_2O_3$ nanoparticles are synthesized by hydrothermal method. The sensor with ${\alpha}-Fe_2O_3$ and NiO nanoparticles mixed at an optimum ratio of 7:3 showed 3.8 times improved sensing performance for 200ppm ethanol gas at $200^{\circ}C$. The enhanced gas sensing performance can be considered to be caused by pn heterojunction at the grain boundaries of ${\alpha}-Fe_2O_3$ and NiO nanopartcles.
Keywords
${\alpha}-Fe_2O_3$; NiO; Nanoparticles; Ethanol; Gas sensor;
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