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

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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.

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Acknowledgments

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

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Authors and Affiliations

  1. Young Researchers Club, Islamic Azad University, East-Tehran (Ghiamdasht) Branch, Tehran, Iran

    J. Saydi

  2. Department of Nanotechnology & Advanced Materials, Materials and Energy Research Center, Karaj, Iran

    M. Karimi

  3. Department of Physics, Faculty of Sciences, I.H.U, Tehran, Iran

    M. Mazhdi

  4. Department of Mechanical Engineering, Islamic Azad University, Ilam Branch, Ilam, Iran

    J. Seidi

  5. Department of Electrical and Robotics Engineering, Shahrood University of Technology, Shahrood, Iran

    F. Mazhdi

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  1. J. Saydi
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  2. M. Karimi
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Correspondence to M. Karimi.

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Saydi, J., Karimi, M., Mazhdi, M. et al. Synthesis, Characterization, and Gas Sensing Properties of Pure and Mn-doped ZnO Nanocrystalline Particles. J. of Materi Eng and Perform 23, 3489–3496 (2014). https://doi.org/10.1007/s11665-014-1162-x

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  • DOI: https://doi.org/10.1007/s11665-014-1162-x

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