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Synthesis of CeO2 or α–Mn2O3 nanoparticles via sol–gel process and their optical properties

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Abstract

Nanocrystalline cubic fluorite/bixbyite CeO2 or α–Mn2O3 has been successfully synthesized by using methanol as a solvent via sol–gel method calcined at 400 °C. The obtained products were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), UV–vis absorption and Photoluminescence (PL) spectroscopy. TEM reveals that the as-synthesized ultra-fine samples consist of elliptical/spherical and sheet-like morphology of crystalline particles of 8/30 nm, which are weakly aggregated. Optical absorbance spectra reveal that the absorption of ceria in the UV region originates from the charge- transfer transition between the O2− (2p) and Ce4+ (4f) orbit in CeO2. However, α–Mn2O3 nanostructures with nearly pure band gap emission should be of importance for their applications as UV emitters.

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Acknowledgments

The authors are grateful to the University Grant Commission for extending financial support to carryout this work.

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Authors and Affiliations

  1. Department of physics, Presidency College, Chennai, 600 005, Tamilnadu, India

    S. Gnanam & V. Rajendran

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  1. S. Gnanam
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  2. V. Rajendran
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Correspondence to S. Gnanam.

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Gnanam, S., Rajendran, V. Synthesis of CeO2 or α–Mn2O3 nanoparticles via sol–gel process and their optical properties. J Sol-Gel Sci Technol 58, 62–69 (2011). https://doi.org/10.1007/s10971-010-2356-9

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  • DOI: https://doi.org/10.1007/s10971-010-2356-9

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