Eu3+:Y2O3 Microspheres and Microcubes: A Supercritical Synthesis and Characterization

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• 作者：M Kempaiah Devaraju ; Shu Yin ; Tsugio Sato
• 刊名：Inorganic Chemistry
• 出版年：2011
• 出版时间：June 6, 2011
• 年：2011
• 卷：50
• 期：11
• 页码：4698-4704
• 全文大小：1000K
• 年卷期：v.50,no.11(June 6, 2011)
• ISSN：1520-510X

文摘

A new approach that uses mixed supercritical solvents of water/1-propanol and water/methanol (400 掳C, 40 MPa) to prepare morphology-controlled precursor materials in a very short reaction time, such as 10 min, followed by calcinations has been developed to form Eu³⁺:Y₂O₃ microspheres of 2鈥? 渭m in diameter or microcubes of 2鈥? 渭m in side length, respectively. Eu³⁺:Y₂O₃ microspheres and microcubes exhibited strong red emission at 610 nm corresponding to ⁵D₀ 鈫?⁷F₂ transition. The highest photoluminescence emission was obtained for the microspheres after calcination at 1000 掳C for 1 h in air.