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Synthesis and structural, optical and thermal properties of ceria and rare earth doped ceria nanocrystals

M. KARL CHINNU1,2,* , K. VIJAI ANAND3, R. MOHAN KUMAR4, T. ALAGESAN4, R. JAYAVEL1

Affiliation

  1. Centre for Nanoscience and Technology, Anna University, Chennai-25, India
  2. Department of Physics, S.A. Engineering College, Chennai-77, India
  3. Department of Physics, Sathyabama University, Chennai-119, India
  4. Department of Physics, Presidency College, Chennai-5, India

Abstract

Single crystalline ceria and rare earth doped ceria nanoparticles have been successfully synthesized by sonochemical method using water solvent from aqueous solution containing Ce(NO3)3.6H2O, Gd(NO3)3·6H2O, Sm(NO3)3·6H2O, NaOH and hexamethylenetetramine (HMTA) as a surfactant. Prepared CeO2, Gd:CeO2 and Sm:CeO2 nanoparticles were dried in air oven at 100 °C for 24 h. The synthesized samples have been subjected to various characterization studies such as X-ray powder diffraction (XRD) for structural confirmation of fluorite cubic. The morphology of the prepared materials was studied by field emission scanning electron microscopy (FE-SEM). Thermo-gravimetric analysis (TG/DTA) reveals that ceria and doped ceria are thermal stable upto 400 ºC. UV-vis absorption of Gd:CeO2 shows red shift, due to the electron- phonon interaction. Fluorescence studies show the emission peaks for ceria at 425 nm and gadolinium and samarium doped ceria at 466 nm..

Keywords

Nanoparticles, Fluorescence, Thermo-gravimetric and HMTA.

Citation

M. KARL CHINNU, K. VIJAI ANAND, R. MOHAN KUMAR, T. ALAGESAN, R. JAYAVEL, Synthesis and structural, optical and thermal properties of ceria and rare earth doped ceria nanocrystals, Optoelectronics and Advanced Materials - Rapid Communications, 7, 11-12, November-December 2013, pp.976-979 (2013).

Submitted at: May 23, 2013

Accepted at: Nov. 7, 2013