Preparation and Spectroscopic, Microscopic, Thermogravimetric, and Electrochemical Characterization of Silver-Doped Cerium(IV) Oxide Nanoparticles

Silver ion-doped cerium oxide nanoparticles were prepared by polyol-based coprecipitation. Here, the impact of silver doping is evaluated on the crystallographic, optoelectronic, thermogravimetric, and redox behavior of cerium oxide nanoparticles. Spectroscopic techniques were used to characterize the phase purity, crystallinity, morphological structure, and optical and redox properties of nanoproducts. X-ray diffraction confirmed the formation of well-crystallized cerium oxide tetragonal fluorite. The optical absorption spectra and band gap energy were significantly affected following doping that was influenced by the crystalline size. Temperature production reduction investigated the influence of silver concentration on the redox properties of cerium oxide nanoparticles. These catalysts were reversible in cyclic redox reaction to 500°C, nonpyrophoric, and therefore demonstrated potential for applications for hydrogen generation for fuel cells and electrochemical biosensors.