Template-free synthesis, characterization, growth mechanism and photoluminescence property of Eu(OH)₃ and Eu₂O₃ nanospindles

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• 作者：Dengsong Zhang ; Tingting Yan ; Liyi Shi ; Hongrui Li ; Joseph F. Chiang
• 关键词：Europium oxide ; Nanostructures ; Photoluminescence
• 刊名：Journal of Alloys and Compounds
• 出版年：2010
• 出版时间：10 September 2010
• 年：2010
• 卷：506
• 期：1
• 页码：446-455
• 全文大小：1124 K

文摘

A simple aqueous solution route was introduced for the fabrication of uniform Eu(OH)₃ and Eu₂O₃ nanospindles, nanorods and nanobundles by using Eu(NO₃)₃ and NaOH as the starting reaction reagents at room temperature and atmosphere pressure without any surfactant and template. The influence of the molar ratios of [OH⁻]/[Eu³⁺], reaction time, and temperature was investigated. It is demonstrated that the size of Eu(OH)₃ nanospindle can be well tuned by adjusting the [Eu³⁺]/[OH⁻] molar ratios. The possible growth mechanism of Eu(OH)₃ and Eu₂O₃ nanostructures is also discussed. The room-temperature photoluminescence analysis shows that Eu₂O₃ nanostructures have an intensive emission peak of Eu³⁺ ion at around 611 nm due to the ⁵D₀–⁷F₂ forced electric dipole transition of Eu³⁺ ions. It is found that the relative peak intensity increases with increasing reaction time.