Study the Properties of Gadolinium-Doped Ceria Nano-Powders Synthesized Via Sol–Gel Method with New Precursors

Recently, the GDC samples have been synthesized as promising materials for applying in solid oxide fuel cells. In the present research, two different kinds of gadolinium-doped ceria (GDC) nano-composites were prepared by a wet-chemical method based on the sol–gel process and new precursors such as CeLH₂, (pyda.H)₂[(Ce(pydc)₃].2CH₃OH and (pyda.H)₂[(Gd(pydc)₃].2CH₃OH, [pydc (2,6-Pyridinedicarboxylic acid), and GdLH₂, pyda (2,6-diaminopyridine)]. The CeLH₂ and GdLH₂ coordination compounds have been prepared by high-energy ultrasound irradiation. The X-ray powder diffraction (XRD) results showed that the crystal lattice of the compounds (I), (II) was obtained cubic fluorite structures. The scanning electron microscope (SEM) analyses of the compounds (I), (II) indicated that the average grain sizes obtained about 20–30 and 50–70 nm, respectively. The results showed that using high intensity ultrasound can be utilized successfully for the synthesis of supramolecular coordination compounds.