八氧化三铀的 X 射线光电子能谱研究

The X-ray photoelectron spectroscopy study of triuranium octaoxide

用Ｘ射线光电子能谱（ＸＰＳ）分析研究了八氧化三铀（Ｕ３Ｏ８）的表面结构以及一氧化碳对Ｕ３Ｏ８表面结构的影响。Ｕ３Ｏ８为混合价化合物，ＸＰＳ分析表明它符合Ｕ２ⅥＵｎ－２ⅣＯ２ｎ＋２模式。在７．２×１０６ＬＣＯ气氛中，Ｕ３Ｏ８中氧含量减少，Ｏ／Ｕ比值下降了８．０％。同时ＵＯ３的量减少了１６．６％。研究结果表明一氧化碳气氛对Ｕ３Ｏ８的表面有一定的还原作用。

The surface structure of triuranium octaoxide(U 3O 8) and the influence of carbon monoxide on the surface layer of U 3O 8 have been studied by X-ray photoelectron spectroscopy(XPS). As a mixed-valence compound, U 3O 8 was found to have a surface structure compatible with the general formula U 2 Ⅵ U n-2 Ⅳ O 2n+2 . After exposure of U 3O 8 to 7.2×10 6 L CO,the content of oxygen in the oxide decreased and O/U ratio decreased by 8.0%, and amount of uranium trioxide in U 3O 8 was decreased by 16.6%. The investigation indicated that the surface of triuranium octaoxide was reduced to some extent in the atmosphere of carbon monoxide.