Ma Chao, Liu Huanhuan, Wolterbeek Hubert T, Denkova Antonia G, Serra Crespo Pablo
Applied radiation and isotopes, Radiation Science and Technology, Faculty of applied sciences, Delft University of Technology, 2629 JB Delft, Mekelweg 15, The Netherlands.
Langmuir. 2022 Jul 26;38(29):8928-8933. doi: 10.1021/acs.langmuir.2c01074. Epub 2022 Jul 11.
Four different MOFs were exposed to γ rays by a cobalt-60 source reaching a maximum dose of 5 MGy. The results showed that the MIL-100 (Cr) and MIL-100 (Fe) did not exhibit obvious structural damage, suggesting their excellent radiation stability. MIL-101 (Cr) showed good radiation stability up to 4 MGy, but its structure started degrading with increasing radiation dose. Furthermore, the results showed that the structure of AlFu MOFs started to decompose at a gamma dose of 1 MGy, exhibiting a much lower tolerance to γ radiation. At this radiation energy, the dominant interaction of the gamma-ray with MOFs is the Compton effect and the radiation stability of MOFs can be improved by prolific aromatic linkers, high linker connectivity, and good crystallinity. The results of this study indicate that MIL-100 and MIL-101 MOFs have a good potential to be employed in nuclear applications, where relatively high radiation doses play a role, for example, nuclear waste treatment and radionuclides production.
四种不同的金属有机框架材料（MOFs）通过钴 - 60源暴露于γ射线下，最大剂量达到5兆戈瑞。结果表明，MIL - 100（Cr）和MIL - 100（Fe）没有表现出明显的结构损伤，表明它们具有优异的辐射稳定性。MIL - 101（Cr）在高达4兆戈瑞的剂量下表现出良好的辐射稳定性，但随着辐射剂量的增加其结构开始降解。此外，结果表明AlFu MOFs的结构在1兆戈瑞的γ剂量下开始分解，对γ辐射的耐受性要低得多。在这种辐射能量下，γ射线与MOFs的主要相互作用是康普顿效应，并且MOFs的辐射稳定性可以通过丰富的芳香族连接体、高连接体连接性和良好的结晶度来提高。本研究结果表明，MIL - 100和MIL - 101 MOFs在核应用中具有良好的应用潜力，在核应用中，例如核废料处理和放射性核素生产，会有相对较高的辐射剂量。
