¡°pan style='font-style: italic'>In situ¡± preparation of a TiO₂/Eu₂O₃ composite film upon Ti alloy substrate by micro-arc oxidation and its photo-catalytic property

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• 作者：Yongqian Wang ; Xudong Jiang ; Chunxu Pan
• 关键词：TiO2/Eu2O3 ; Composite film ; MAO ; Photocatalysis
• 刊名：Journal of Alloys and Compounds
• 出版年：2012
• 出版时间：15 October, 2012
• 年：2012
• 卷：538
• 期：Complete
• 页码：16-20
• 全文大小：822 K

文摘

The TiO₂/Eu₂O₃ composite film was prepared by using a micro-arc oxidation (MAO) technique. The experimental results showed that the photo-catalytic performance of the TiO₂/Eu₂O₃ composite film exhibited twice higher than that of the film without Eu₂O₃ additive. The reason was that the ion Eu³⁺ in Eu₂O₃ had an incomplete 4f orbital track and an empty 5d orbital track, which tended to produce multi-electron configuration, and therefore could effectively inhibit the recombination of photo-generated electrons and holes. In addition, the ground-state energy was close to the excited-state energy in the ion Eu³⁺, which enhanced the transition of f-electron from the ground-state to the excited-state under the visible light irradiation, and then exhibited a higher absorption in the visible light range.