The Effect of pH on the Properties of Hydrothermally Synthesized CeO2 Nanoparticles

Abstract

In this study CeO₂ NPs were successfully prepared via the hydrothermal method and influence of pH on the properties . The prepared nano-sized particles were characterized using various techniques including: Ultraviolet-Visible (UV–Vis) spectroscopy, X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), Energy-Dispersive X-ray spectroscopy (EDX). The (UV–Vis) spectra showed the absorption peak changing from 335 nm to 298 nm with increasing pH value from 7 to 11, indicating the occurrence of a blue shift, which is a prior indication of the decrease in the grain size of CeO2 nanoparticles with increasing pH value. The XRD pattern of CeO₂ NPs reveals the fluorite cubic structure, the crystallite size changes with an increase in pH value. According to FETEM image analysis, the average CeO₂ particle size decreases from35.85 to 20.65 nm with increasing pH value from 7 to 11. Energy Dispersive X-ray analysis (EDX) was utilized to determine the constituent elements of CeO₂ NPs mixture.