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Structure, Dielectric Permittivity, and AC Conductivity of Cobalt and Lanthanum Doped TiO2 Composites

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Abstract

Lanthanum doped titanium dioxide (La/TiO2) was synthesized by a lengthy wet impregnation method with cobalt (Co/TiO2). The prepared composites were characterized by X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), and scanning electron microscopy (SEM). The XRD spectrum of TiO2 shows that the transition dopants are well dispersed within the TiO2 matrix. The SEM images show no noticeable morphological differences between the TiO2, La/TiO2, and Co/TiO2 composites. The dielectric properties and electrical of TiO2, La/TiO2, and Co/TiO2 were investigated within temperature and frequency of 25–120 °C and 100 Hz to 0.3 MHz, respectively. It was noted that the dielectric constant decreases with increasing temperature. TiO2 dielectric permittivity and electrical conductivity increased as a result of doping. In addition, the activation energy values for all samples were evaluated. By increasing frequency, activation energy values decreased and this decrease intensified when the Co ions are the substituents in the TiO2 matrix. Otherwise, the values of activation energy are constant for La-dopedTiO2.

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Acknowledgements

The authors thank Taif University Researchers Supporting Project Number (TURSP-2020/272) Taif University, Taif, Saudi Arabia. The authors would like to thank the Deanship of Scientific Research at Shaqra University for supporting this work.

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Authors and Affiliations

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

    T. Abdel-Baset

  2. Physics Department, Fayoum University, Fayoum, 63514, Egypt

    T. Abdel-Baset

  3. Department of Chemistry, College of Science and Humanities, Shaqra University, Ad-Dawadmi, shaqra, 11911, Saudi Arabia

    Abdullah A. Alotaibi

  4. Department of Chemistry, Faculty of Science, Taibah University, Al-Madinah Almunawrah, Yanbu, 46423, Saudi Arabia

    Ali H. Bashal

  5. Department of Physics, College of Science, Taif University, P.O. Box11099, Taif, 21944, Saudi Arabia

    M. G. Althobaiti

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  1. T. Abdel-Baset
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  2. Abdullah A. Alotaibi
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  3. Ali H. Bashal
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  4. M. G. Althobaiti
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Correspondence to Abdullah A. Alotaibi.

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Abdel-Baset, T., Alotaibi, A.A., Bashal, A.H. et al. Structure, Dielectric Permittivity, and AC Conductivity of Cobalt and Lanthanum Doped TiO2 Composites. Arab J Sci Eng 48, 197–204 (2023). https://doi.org/10.1007/s13369-022-06868-5

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  • DOI: https://doi.org/10.1007/s13369-022-06868-5

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