Abstract

Y. A. Syed Khadar¹, A. Balamurugan², V.P. Devarajan¹ and R. Subramanian¹

DOI : http://dx.doi.org/10.13005/ojc/330533

This present study has been described the synthesis, characterization and antibacterial activity of gadolinium doped cerium oxide nanoparticles. The nanoparticles were prepared by hydrothermal method with various concentrations of gadolinium ranges from 2mol % to 8mol %. The X-ray diffraction (XRD) pattern revealed the face-centered cubic structure with crystalline size of 58.3 nm to 57.4 nm with increasing the concentration of gadolinium (2mol % to 8mol %). The Ce-O chemical bonding nature was confirmed using Fourier transform spectrophotometer (FTIR). The field emission scanning electron microscope (FESEM) exhibited fascinating shapes like cube and square of nanoparticles. UV spectroscopy used to measure the optical behaviors of CeO₂ nanoparticles. Band-edge absorption of CeO₂ nanoparticles blue shifted upon increasing the gadolinium concentration as compared to undoped CeO₂ nanoparticles. The emission behavior of nanoparticles was examined by photoluminescence (PL) spectroscopy. PL spectra reveals a peak shift of CeO2 emission upon gadolinium doped due to oxygen defect.  The gadolinium doped CeO₂ nanoparticles showed better antibacterial activity against the pathogenic bacteria such as Escherichia coli, Staphylococcus aureus, Bacillus cereus and Salmonella typhi.

CeO2 Nanoparticles; Hydrothermal method; Morphology; Antibacterial activity

[ View HTML Full Text]