Influence of Mn2+ Substitution on the Optical Properties of Novel CaLi2O2 Nanoparticles Synthesized by Sol-gel Method

Authors A. Kadari1, A. Azaiz2, N. Mokhtari1, D. Horri1

1Engineering Physics Laboratory, University of Tiaret, Algeria

2Synthesis and Catalysis Laboratory, University of Tiaret, Algeria

Issue Volume 12, Year 2020, Number 6
Dates Received 14August 2020; revised manuscript received 15 December 2020; published online 25 December 2020
Citation A. Kadari, A. Azaiz, et al., J. Nano- Electron. Phys. 12 No 6, 06009 (2020)
PACS Number(s) 81.20.Fw, 82.33.Ln
Keywords Sol-gel (17) , CaLi2O2, Mn2+ doping, Band gap (29) .

A novel calcium lithium composite oxide CaLi2O2 nanoparticle has been successfully synthesized by using sol-gel method. The objective of the present work is to examine the change of optical properties with the change of Mn2+ ion concentration in CaLi2O2 nanoparticles. The novelty of this study is the synthesis of Mn-doped CaLi2O2 nanoparticles. In order to investigate their physical properties the resulting samples in powder form were thermally treated at 300 °C and then characterized by powder X-ray diffraction (XRD), UV-Visible (UV-Vis) spectroscopy and Fourier Transform Infrared spectroscopy (FT-IR). The XRD patterns show that the crystalline structure has been changed with the change of Mn2+ ion concentration in CaLi2O2 lattice. The incorporation of manganese atoms into CaLi2O2 has been confirmed by the FT-IR spectroscopy. This may be explained by the apparition of some absorption bands in the wavenumber range from 584 to 601 cm – 1. The particles size decreases from 463 Ǻ to 117 Ǻ. The band gap values were tuned from 3.769 eV to 3.794 eV and discussed based on the quantum confinement effect.

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