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http://dx.doi.org/10.4313/JKEM.2017.30.5.288

Gas Sensing Properties of Pt Doped Fe2O3 Nanoparticles Fabricated by Sol-Gel Method  

Jang, Min-Hyung (Department of Electrical and Computer Engineering, Pusan National University)
Lim, Yooseong (Department of Electrical and Computer Engineering, Pusan National University)
Choi, Seung-Il (Department of Advanced Circuit Interconnection, Pusan National University)
Park, Ji-In (Department of Electrical and Computer Engineering, Pusan National University)
Hwang, Namgyung (Department of Electrical and Computer Engineering, Pusan National University)
Yi, Moonsuk (Department of Electrical and Computer Engineering, Pusan National University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.30, no.5, 2017 , pp. 288-293 More about this Journal
Abstract
$Fe_2O_3$ is one of the most important metal oxides for gas sensing applications because of its low cost and high stability. It is well-known that the shape, size, and phase of $Fe_2O_3$ have a significant influence on its sensing properties. Many reports are available in the literature on the use of $Fe_2O_3$-based sensors for detecting gases, such as $NO_2$, $NH_3$, $H_2S$, $H_2$, and CO. In this paper, we investigated the gas-sensing performance of a Pt-doped ${\varepsilon}$-phase $Fe_2O_3$ gas sensor. Pt-doped $Fe_2O_3$ nanoparticles were synthesized by a Sol-Gel method. Platinum, known as a catalytic material, was used for improving gas-sensing performance in this research. The gas-response measurement at $300^{\circ}C$ showed that $Fe_2O_3$ gas sensors doped with 3%Pt are selective for $NO_2$ gas and exhibita maximum response of 21.23%. The gas-sensing properties proved that $Fe_2O_3$ could be used as a gas sensor for nitrogen dioxide.
Keywords
Metal-Oxide; Gas sensor; Sol-gel method; $Fe_2O_3$; Chemiresistor;
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