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

NiO의 첨가에 따른 α-Fe2O3 나노입자 센서의 에탄올 가스 검출 특성 향상

Park, Sunghoon;Kang, Wooseung

  • Received : 2016.01.22
  • Accepted : 2016.02.12
  • Published : 2016.02.29


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.


${\alpha}-Fe_2O_3$;NiO;Nanoparticles;Ethanol;Gas sensor


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