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Effect of Gd3+ doping on structural and optical properties of MgO–MgAl2O4 nanocomposites synthesized via co-precipitation method

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Abstract

In this study, un-doped MgO–MgAl2O4 and Gd3+-doped MgO–MgAl2O4 nanocomposites have been synthesized via co-precipitation method. The effects of Gd3+ contents on the structureal and optical properties of MgO–MgAl2O4 nanocomposites were investigated using scanning electron microscope (SEM), high-resolution transmission electron microscope (HRTEM), X-ray diffraction, Fourier-transform infrared and UV–VIS spectroscopies. HRTEM shows that MgO–MgAl2O4 powder are uniform spherical shape nanoparticles. The XRD shows that the nanocomposites consist of face-centered cubic MgAl2O4 and MgO crystal structures. The average crystallite sizes of MgO–MgAl2O4 nanocomposites are in the range of 8–40 nm. The quantitative elemental analysis by EDX illustrates that the nanocomposite samples are nearly stoichiometric MgO–MgAl2O4 48 to 52%, respectively. Scanning electron microscopy was used to study the surface morphology of MgO–MgAl2O4 nanocomposites that reveals the existence of both the individual nanoparticles and their aggregates. The optical bandgap was decreased with the presence of Gd3+ from 4.85 to 3.66 eV for 0.0 and 3% of Gd3+ content, respectively. The photoluminescence of un-doped and Gd-doped MgO–MgAl2O4 nanocomposite showed a green emission in the range (545–565 nm).

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Acknowledgment

Author would like to wish their sincere thanks to Prof. Z. Ali, National Center for Radiation Research and Technology, for his adivce on writing the article.

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Authors and Affiliations

  1. National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt

    M. M. Shehata & S. A. Waly

  2. Second Research Reactor, Nuclear Research Center, Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt

    S. A. Waly & Y. A. Abdelaziz

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  1. M. M. Shehata
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  2. S. A. Waly
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  3. Y. A. Abdelaziz
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Correspondence to M. M. Shehata.

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Shehata, M.M., Waly, S.A. & Abdelaziz, Y.A. Effect of Gd3+ doping on structural and optical properties of MgO–MgAl2O4 nanocomposites synthesized via co-precipitation method. J Mater Sci: Mater Electron 32, 7423–7430 (2021). https://doi.org/10.1007/s10854-021-05455-y

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  • DOI: https://doi.org/10.1007/s10854-021-05455-y

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