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Journal of Materials Engineering and Performance

, Volume 23, Issue 10, pp 3489–3496 | Cite as

Synthesis, Characterization, and Gas Sensing Properties of Pure and Mn-doped ZnO Nanocrystalline Particles

  • J. Saydi
  • M. Karimi
  • M. Mazhdi
  • J. Seidi
  • F. Mazhdi
Article

Abstract

Nanocrystalline ZnO and Mn (1 wt.%)-doped ZnO particles have been synthesized via reverse micelle method. The structural, particulate, and optical properties of the synthesized nanoparticles have been studied by XRD, TEM, UV-Vis, and PL spectroscopy. The obtained data indicate the synthesis of the pure nanoparticles structure with wurtzite structure, average particle size of 18-21 nm, and high optical quality. Gas sensing properties of the nanocrystalline ZnO and Mn-doped ZnO particles toward gasoline and ethanol vapors have been investigated at different temperatures and concentrations. The results show that the optimum working temperature of the gas sensors based on ZnO and Mn-doped ZnO particles are about 633 and 620 K toward ethanol vapor and about 560 and 608 K toward gasoline vapor, respectively. Based on the results, although Mn impurities reduce the sensitivity of the ZnO gas sensor, they cause sensor to saturate at much higher gas concentration.

Keywords

gas sensor Mn-doped ZnO nanocrystalline particles photoluminescence sensitivity ZnO 

Notes

Acknowledgments

The financial support of Iran Nanotechnology Initiative Council and Islamic Azad University is gratefully acknowledged.

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Copyright information

© ASM International 2014

Authors and Affiliations

  • J. Saydi
    • 1
  • M. Karimi
    • 2
  • M. Mazhdi
    • 3
  • J. Seidi
    • 4
  • F. Mazhdi
    • 5
  1. 1.Young Researchers ClubIslamic Azad UniversityTehranIran
  2. 2.Department of Nanotechnology & Advanced MaterialsMaterials and Energy Research CenterKarajIran
  3. 3.Department of Physics, Faculty of SciencesI.H.UTehranIran
  4. 4.Department of Mechanical EngineeringIslamic Azad UniversityIlamIran
  5. 5.Department of Electrical and Robotics EngineeringShahrood University of TechnologyShahroodIran

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