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Structure and AC conductivity of zinc and nickel-doped TiO2 nanocomposite synthesized by simple incipient wet impregnation method

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Abstract

The characterization of Zn/TiO2 and Ni/TiO2 composites has been investigated by scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction. The AC conductivity was measured in the frequency range 0.1 kHz to 3 MHz at temperatures from 25 to 100 °C. X-ray diffraction results revealed the presence of the anatase phase of TiO2, while presenting low peaks of rutile phase attributed to the Ni and Zn traces in the TiO2. A peak shift was appearing for Ni-doped TiO2 due to the change in the ionic radius which reduced the average particle size from 19 to 15 nm. The electrical conductivity was constant at low frequencies and increased with increasing frequency and doping with Zn and Ni, confirming the semiconductor nature of the samples and indicating localized/reorientation conduction mechanism. Interestingly, the frequency-dependent activation energy was found to be affected by the type of dopants.

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Authors and Affiliations

  1. Department of Physics, Faculty of Science, Taibah University, Yanbu, 46423, Saudi Arabia

    T. A. Abdel-Baset

  2. Department of Physics, Faculty of Science, Fayoum University, 63514, Fayoum, Egypt

    T. A. Abdel-Baset

  3. Department of Chemistry, Faculty of Science, Taibah University, 46423, Yanbu, Saudi Arabia

    Ali H. Bashal

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Correspondence to Ali H. Bashal.

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Abdel-Baset, T.A., Bashal, A.H. Structure and AC conductivity of zinc and nickel-doped TiO2 nanocomposite synthesized by simple incipient wet impregnation method. J Mater Sci: Mater Electron 31, 18533–18540 (2020). https://doi.org/10.1007/s10854-020-04397-1

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