Abstract: In this work, Lanthanum oxide (La2O3) nanoparticles were synthesized by co-precipitation method and analyze their structural and optical properties. X-ray diffraction (XRD) pattern confirms the formation of hexagonal structured La2O3 nanoparticles with slight mixed state of hydroxides and carbonates. The crystallite size of La2O3 nanoparticles was obtained by using Debye-Scherer’s calculation and Williamson-Hall (W-H) plot analysis methods. The existence of La-O stretching band at < 800 cm-1 in the Fourier transformed infrared (FTIR) spectrum confirms the formation of La2O3 nanoparticles. Scanning electron microscopy (SEM) images represents the appearance of spherical shaped particles with nanosize regime. Further, the optical properties of La2O3 nanoparticles were investigated from UV-visible diffuse reflectance spectroscopy and the indirect band gap value was found to be 5.35 eV. Photoluminescence (PL) spectrum exhibits the broad emission peak in the wavelength ranges of 356-732 nm under the excitation of 230 nm.
Keywords: La2O3, uncalcined, Nanoparticles, co-precipitation, crystallite size, optical properties.
Title: Synthesis, Structural and Optical Characterization of Uncalcined Lanthanum Oxide Nanoparticles by Co-Precipitation Method
Author: N.Ramjeyanthi, M.Alagar, D.Muthuraman
International Journal of Interdisciplinary Research and Innovations
ISSN 2348-1218 (print), ISSN 2348-1226 (online)
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