【摘要】 采用X射线光电子能谱法 (XPS)研究了金属铀在 0 8mol/LNaOH溶液中阳极氧化膜的组成。结果表明 ,在本实验条件下 ,金属铀表面的阳极氧化膜主要由UO3 和少量UO2 +x组成 ;在超真空条件下 ,氧化膜中的部分UO3 逐渐还原成UO2 +x更多还原

【Abstract】 X ray photoelectron spectroscopy (XPS) is used to examine the anodic oxide film formed on uranium metal in 0.8 mol/L NaOH solution. The U4 f 7/2 fitting spectra suggests that the anodic oxide film is composed of uranium trioxide and a small amount of UO 2+ x . Under UHV condition, the U4 f peak shifts to the lower binding energy, while a gradual increase in the intensity of U5 f peak and the broading of U4 f peak are also observed. All of these changes are due to reduction of uranium trioxide in the anodic oxide film. XPS quantitative analysis confirms the occurrence of reduction reaction.更多还原