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Metals and Materials International

, Volume 23, Issue 1, pp 214–219 | Cite as

Hydrogen gas detection of Nb2O5 nanoparticle-decorated CuO nanorod sensors

  • Hyejoon Kheel
  • Gun-Joo Sun
  • Jae Kyung Lee
  • Ali Mirzaei
  • Seungbok Choi
  • Chongmu LeeEmail author
Article

Abstract

Pristine and Nb2O5 nanoparticles-decorated CuO nanorods were prepared successfully by a two step process: the thermal evaporation of a Cu foil and the spin coating of NbCl5 solution on CuO nanorods followed by thermal annealing. X-ray diffraction was performed to examine the structure and purity of the synthesized nanoatuctures. Scanning electron microscopy was used to examine the morphology and shape of the nanostuctures. The Nb2O5 nanoparticles-decorated CuO nanorod sensor showed responses of ~217.05-862.54%, response times of ~161-199 s and recovery times of ~163-171 s toward H2 gas with concentrations in a range of 0.5 - 5% at the optimal working temperature of 300 °C. The Nb2O5 nanoparticle-decorated CuO nanorod sensor showed superior sensing performance to the pristine CuO nanorod sensor for the same H2 concentration range. The underlying mechanism for the enhanced hydrogen sensing performance of the CuO nanorods decorated with Nb2O5 nanoparticles is discussed.

Keywords

semiconductors nanostructured materials oxidation electrical properties scanning electron microscopy (SEM) 

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Copyright information

© The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht 2017

Authors and Affiliations

  • Hyejoon Kheel
    • 1
  • Gun-Joo Sun
    • 1
  • Jae Kyung Lee
    • 1
  • Ali Mirzaei
    • 2
  • Seungbok Choi
    • 3
  • Chongmu Lee
    • 1
    Email author
  1. 1.Department of Materials Science and EngineeringInha UniversityIncheonRepublic of Korea
  2. 2.Department of Materials Science and EngineeringShiraz UniversityShirazIran
  3. 3.Department of Mechanical EngineeringInha UniversityIncheonRepublic of Korea

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