Influence of additives on low-temperature hydrothermal synthesis of UO_2+x and ThO₂

Abstract

UO2+x and ThO2 were synthesized through a hydrothermal reaction by adding aldehydes.

Ultrasonically controlled synthesis of UO2+xcolloidal nanoparticles

“…1,33 Also, the recent work of Tabata et al showed the formation of UO 2+x nanoparticles under hydrothermal treatment (100-450 °C) from U(IV) or U(VI) nitrates in the presence of organic additives (ethanol, aldehyde, carbonate, etc.). 34,35 The experimental conditions have an influence on the size, crystallinity and shape of the NPs, which can be spherical or rectangular. Gerber et al prepared UO 2 NPs measuring 2-3 nm in diameter in the presence of ammonia under a nitrogen atmosphere ( pH 8-11).…”