E-beam and UV induced fabrication of CeO2, Eu2O3 and their mixed oxides with UO2

摘要

CeO2, Eu2O3 and mixed oxides of CeO2-UO2, Eu2O3-UO2 were fabricated. The preparative method was based on the irradiation of aqueous solutions containing cerium/europium (and uranyl) nitrates and ammonium formate. In the course of irradiation, the solid phase (precursor) was precipitated. The composition of irradiated solutions significantly affected the properties of precursor formed in the course of the irradiation. However, subsequent heat treatment of (amorphous) precursors at temperatures <= 650 degrees C invariably resulted in the formation of powder oxides with well-developed nanocrystals with linear crystallite size 13-27 nm and specific surface area 10-46 m(2) g(-1). The applicability of both ionizing (e-beam) and non-ionizing (UV) radiation was studied. (C) 2015 Elsevier Ltd. All rights reserved.