Synthesis of ZnO doped ceria nanoparticles via azeotropic distillation processing
(1.湖南省长沙市中南大学资源加工与生物工程学院2.中南大学 资源加工与生物工程学院 无机材料系, 长沙 4100833.中南大学 资源加工与生物工程学院，湖南 长沙，4100834.Key Laboratory of Biometallurgy of Ministry of Education, School of Resources Processing and Bioengineering, Central South University, Changsha 410083, China)
Abstract: The synthesis of nano-sized ZnO-doped CeO2 of 20 nm in crystal size by a coprecipitation technique was investigated by different scanning calorimetries/thermalgravimetrics(DSC/TG), X-ray diffraction (XRD), transmission electron microscopy (TEM) and ultraviolet (UV) absorbance. Azeotropic distillation processing was performed to effectively eliminate the residual water inside the as-prepared precipitate. Doping of ZnO results in the formation of solid solution. The crystal size of the nanoparticles increases with the increase of the doped ZnO amount, the calcination temperature and time. Doped CeO2 nanoparticles show excellent visible-light property and ultraviolet-absorption activity. Doping of ZnO doesn’t not weaken the UV-shielding property of ceria.
Key words: ceria nanoparticles; ZnO doping; inorganic compounds; nanostructures; oxides