Jang Harry, Louis-Jean James, Poineau Frederic
Department of Chemistry and Biochemistry, University of Nevada Las Vegas, 4505 S. Maryland. Parkway, Las Vegas, Nevada 89154, United States.
ACS Omega. 2023 Jun 8;8(24):21996-22002. doi: 10.1021/acsomega.3c01999. eCollection 2023 Jun 20.
Uranium-based microspheres are of interest due to their potential applications as targets for medical isotopes production, as fuel for nuclear reactors, and as standardized materials for nuclear forensics. Here, for the first time, UOF microspheres (1-2 μm) have been prepared from the reaction between UO microspheres and AgHF in an autoclave. In this preparation, a new fluorination method has been applied, and HF-produced from the thermal decomposition of AgHF and NHHF-was used as the fluorinating agent. The microspheres were characterized by powder X-ray diffraction (PXRD) and scanning electron microscopy (SEM). Diffraction results indicated that the reaction performed with AgHF at 200 °C led to anhydrous UOF microspheres, while at 150 °C, hydrated UOF microspheres were obtained. Meanwhile, NHHF led to the formation of contaminated products as driven by the formation of volatile species.
基于铀的微球因其作为医用同位素生产靶材、核反应堆燃料以及核法医鉴定标准材料的潜在应用而备受关注。在此，首次通过在高压釜中使UO微球与AgHF反应制备出了UOF微球（1 - 2微米）。在该制备过程中，应用了一种新的氟化方法，由AgHF热分解产生的HF以及NHHF被用作氟化剂。通过粉末X射线衍射（PXRD）和扫描电子显微镜（SEM）对微球进行了表征。衍射结果表明，在200°C下与AgHF进行的反应生成了无水UOF微球，而在150°C时得到的是水合UOF微球。同时，由于挥发性物质的形成，NHHF导致形成了受污染的产物。
