在现场生成的化物辅助的氧化物通过离子液体快速溶解
Priya Goyal1, Arijit Sengupta1,2, Ashutosh Srivastava1
1Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
Inorganic chemistry
|April 9, 2024
概括
氧化在离子液体中迅速溶解,使用在位生成的化离子. 这种方法实现了高负载,并使电子沉积成为可能,为核材料加工提供了一个有前途的方法.
科学领域:
- 核化学 核化学 核化学
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 氧化 (U3O8) 在再加工的溶解过程中存在挑战.
- 离子液体具有独特的溶剂特性,可以使材料难以溶解.
研究的目的:
- 开发一种快速有效的方法来溶解U3O8在离子液体中.
- 调查化物离子生成的机制及其在溶解中的作用.
- 为了探索溶解的的电沉积.
主要方法:
- 用酸预平衡1-基-3-甲基利米达六酸离子液体,以在现场产生化物离子.
- 在65°C时,U3O8的定量溶解.
- 使用伪二次率模型进行动力分析.
- 在铜板上电化学沉积.
- 使用EDXRF和XRD进行表征.
主要成果:
- 在2小时内实现了U3O8的定量,内热溶解.
- 溶解效率遵循的趋势是UO3 > UO2 > U3O8.
- 化物生成随着酸度,含水量和平衡时间的增加而增加.
- 溶解率遵循的趋势是C4mim·PF6 > C6mim·PF6 > C8mim·PF6.
- 最大载荷达到了200 mg mL-1.1.
- 溶解和化物生成遵循的是伪二阶动力学.
- 成功电沉积了,形成了UO2.
结论:
- 在离子液体中的现场化物生成提供了快速溶解U3O8的有效方法.
- 该过程是高效的,实现了高负载,并使随后的电沉积成为可能.
- 伪二阶动力学控制化物生成和U3O8溶解.
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