Effect of bath temperature on synthesis of Uranium trioxide nanoparticles

The metal uranium has got several oxides such as: Uranium dioxide (UO2), Diuraniumpentoxide (U2O5), Uranium trioxide (UO3), Triuraniumoctoxide (U3O8), and Uranyl peroxide (UO4). Each of these oxides has their unique usages. In close nuclear fuel cycles of nuclear reactors, UO3 is the main material during the reprocessing stage of nuclear fuels. Various reactions have previously been utilized in the preparation of uranium trioxide. These include the thermal decomposition of ammonium diuranate, uranium peroxide hydrate, uranyl nitrate and the UO3 hydrates, as well as oxidation of U3O8 and other uranium compounds. Other methods such as Sol-Gel, hydrothermal, and solvothermal have been used for this preparation, but each has its own problems. The purpose of this research beside investigating the effect of bath temperature on Uranium trioxide morphology, is to explore crystal growth of uranium trioxide nanoparticles in a closed system, by an improved, fast, clean, facile, and novel method for their preparation, which lacks the disadvantages of other methods. The synthesized powder was characterized by means of Powder X-ray Diffraction (PXRD), and Scanning Electron Microscopy (SEM). The obtained product of B4 sample consisted of uniform nanospheres with 39.827 nm in diameter and with narrow size distribution. Because the UO3 formation is an endothermic reaction, no powder were obtained from the B2 sample (with low electrolyte temperature).

کلیدواژه ها:

Uranium trioxide ، Electrodeposition ، nanoparticles ، SEM ، XRD