One-step synthesis of ceria (CeO2) nano-spheres by a simple wet chemical method
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초록
In this research a new synthesis of CeO2 nanoparticles using cerium chloride as precursor have been investigated. Sampleswere obtained by wet chemical method and characterized by the Powder X-ray Diffraction (PXRD), Scanning ElectronMicroscopy (SEM), high resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy(FTIR) and UV-Vis spectrophotometer. Particle size has been obtained as 50 nm for annealed nanoparticles increasing withthe increase of the annealing temperature and they changed from sphere-like shaped to cubic-like shaped with increasingannealing temperature. Detailed measurements of XRD spectra exhibited cubic structure of nanocrystals. The surfacemorphological studies from SEM depicted a change in shape and crystality of particles with formation of clusters for calcinedparticles. The particle size of CeO2 was around 50 nm as estimated by XRD technique and direct HRTEM observation. Thesharp peaks in FTIR spectrum determined the purity of CeO2 nanoparticles and absorbance peak of UV-Vis spectrum showedthe small bandgap energy of 3.26 ev.
Abstract
In this research a new synthesis of CeO2 nanoparticles using cerium chloride as precursor have been investigated. Sampleswere obtained by wet chemical method and characterized by the Powder X-ray Diffraction (PXRD), Scanning ElectronMicroscopy (SEM), high resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy(FTIR) and UV-Vis spectrophotometer. Particle size has been obtained as 50 nm for annealed nanoparticles increasing withthe increase of the annealing temperature and they changed from sphere-like shaped to cubic-like shaped with increasingannealing temperature. Detailed measurements of XRD spectra exhibited cubic structure of nanocrystals. The surfacemorphological studies from SEM depicted a change in shape and crystality of particles with formation of clusters for calcinedparticles. The particle size of CeO2 was around 50 nm as estimated by XRD technique and direct HRTEM observation. Thesharp peaks in FTIR spectrum determined the purity of CeO2 nanoparticles and absorbance peak of UV-Vis spectrum showedthe small bandgap energy of 3.26 ev.
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