Lead metallic-lead dioxide glasses as alternative of immobilization of the radioactive wastes

摘要: Abstract In this work, we report structural, optical and electrochemical investigations on the gadolinium–lead glass system with xGd2O3·(100 − x)[4PbO2·Pb] composition where x = 0, 1, 5, 10, 15 mol% Gd2O3 obtained by melt quenching method. The studied homogeneous was characterized X-ray diffraction (XRD), infrared (IR) spectroscopy, ultraviolet–visible (UV–VIS) electron paramagnetic resonance (EPR) cyclic voltammetry (CV) measurements. purpose of paper i) to immobilize gadolinium ions in lead–lead dioxide glasses ii) investigate properties for possible applications radioactive waste recycling. IR data show that [PbO6] octahedral structural units do not accommodate excess non-bridging oxygen, [PbO3] pyramidal are suitable neighbors [GdOn] entities will be intercalated host matrix. EPR spectra Gd+ 3 exhibit four lines situated at about g ≈ 2.0; 2.8; 4.8 6. signals located g ~ 2; 2.8 6 known as U-spectrum higher symmetry which can readily accommodated a vitreous whereas sharpness signal g ~ 4.8 is associated having low coordination numbers. These modifications supported increase intensity UV–VIS absorption bands electronic transitions Pb+ 2 formation oxygen centers. Electrochemical performances electrode pronounced mobility lead comparative ions.