The influence of the sample morphology and experimental conditions towards the sonochemical dissolution of nanoscale ThO₂ samples in sulfuric acid media is described. Significant sonochemical dissolution rates and yields are observed at 20 kHz under Ar/O₂ atmosphere in dilute 0.5 M H₂SO₄ at room temperature, contrasting with the generally-reported high refractory behavior for ThO₂. The dissolution of ThO₂ combines the physical effects driven by acoustic cavitation phenomenon, the complexing affinity of Th(IV) in sulfuric medium and the sonochemical generation of H₂O₂. These sonochemical conditions further allow the observation of the partial conversion of ThO₂ into a scarce Th(IV) peroxo sulfate with 1D morphology resulting from one or both following processes: dissolution/reprecipitation or formation of an intermediate Th(IV) surface complex.

描述了样品的形态和实验条件对纳米ThO ₂样品在硫酸介质中声化学溶解的影响。与通常报道的ThO _2的高耐火性能相反，在Ar / O ₂气氛中于20 kHz ，室温，0.5 MH ₂ SO ₄稀溶液中观察到了明显的声化学溶解速率和产率。ThO ₂的溶解综合了由声空化现象，Th（IV）在硫酸介质中的络合亲和力以及H ₂ O ₂的声化学生成所驱动的物理效应。这些声化学条件进一步允许观察到ThO ₂部分转化为稀有的Th（IV）过氧硫酸盐，其由以下一个或两个过程产生：1D形态：溶解/再沉淀或形成中间Th（IV）表面络合物。