In this work, a technique was proposed to prepare UO₂ from UO₃ by the two processes of fluorination reaction of UO₃ with NH₄HF₂ and electrochemical reduction of ${\text{UO}}_2^{2+}$ for the recycle uranium. The feasibility of fluorination reaction was firstly confirmed using thermodynamic calculation; then, the products were analyzed using XRD, Raman and fluorescence to be UO₂F₂. The fluorination mechanism was inferred to be UO₃(s) + NH₄HF₂ → (NH₄)₃UO₂F₅→ NH₄(UO₂)₂F₅ → UO₂F₂. The redox behavior of ${\text{UO}}_2^{2+}$ on W electrode was investigated by cyclic voltammetry and square wave voltammetry, which indicated that ${\text{UO}}_2^{2+}$ was reduced to UO₂ via a two-step single electron transfer with diffusion-controlled. The diffusion coefficient of ${\text{UO}}_2^{2+}$ was calculated to be 6.22 × 10⁻⁵ cm²/s. The disproportionation reaction of ${\text{UO}}_2^{+}$ was observed, and the relationship between the disproportionation reaction and scan rate was discussed. Moreover, the electrochemical fabrication of UO₂ was conducted by electrolysis at −0.8 V, and the product was analyzed by XRD, SEM and EDS to be UO₂. ICP-AES results showed that the extraction efficiency of UO₂ could reach 98.53%.

在这项工作中，提出了一种通过UO ₃与NH ₄ HF ₂的氟化反应和电化学还原UO _{3两个过程来制备UO 2的技术。}${\text{UO}}_2^{2+}$用于回收铀。首次通过热力学计算证实了氟化反应的可行性；然后，使用XRD、拉曼和荧光分析产物为UO ₂ F ₂。推测其氟化机理为UO ₃ (s) + NH ₄ HF ₂  → (NH ₄ ) ₃ UO ₂ F ₅ → NH ₄ (UO ₂ ) ₂ F ₅  → UO ₂ F ₂。的氧化还原行为${\text{UO}}_2^{2+}$用循环伏安法和方波伏安法研究了 W 电极上的${\text{UO}}_2^{2+}$通过具有扩散控制的两步单电子转移将其还原为UO _{2 。} 扩散系数${\text{UO}}_2^{2+}$计算为6.22×10 ^-5 cm ² /s。歧化反应${\text{UO}}_2^{+}$观察，讨论歧化反应与扫描速率的关系。_{此外，在-0.8 V下通过电解进行UO 2}的电化学制备，产物通过XRD、SEM和EDS分析为UO ₂。ICP-AES结果表明，UO ₂的提取效率可达98.53%。