| 光谱学与光谱分析 |
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| Fluorescence Studies of Eu Ions Adsorption on Pseudo-Boehmite Colloidal Particle Surface |
| MENG Yan-shuang1,2,WANG Da-jian3*,WU Jun1,2,LIU Hui-ji1,2,JU Shao-hua1,2 |
1. National Nickel and Cobalt Advanced Materials Engineering Research Center, Lanzhou 730101, China
2. Jinchuan Nickel-Cobalt Research and Engineering Institute, Lanzhou 730101, China
3. Materials Physics Institute, Tianjin University of Technology, Tianjin 300191, China |
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Abstract Stable pseudo-boehmite sol was obtained by adding HNO3 as peptizing agent and adjusting pH to be 2.0. TEM result shows that the AlOOH colloidal particle size is about 60 nm. Field emission transmission electron microscope (FETEM) result shows that pseudo-boehmite colloidal particle is composed of 8nm scaled AlOOH nanocrystals. The interaction of Eu3+ ions and colloidal AlOOH nanoparticle was investigated. The adsorption of Eu3+ ions on the surface of AlOOH nanocrystal was attributed to the chemical adsorption caused by electrostatic attraction. The photoluminescence characters of Eu3+ in AlOOH/Eu(NO3)3 composite sol system were investigated. The 529 nm emission intensity of Eu3+,I592,decreased with the increase in the molar ratio of AlOOH and Eu3+,RBoe/Re. The adsorption ratio (denoted R) and the adsorption density (denoted D) of Eu3+ ions on AlOOH colloidal particle surface was calculated from I592. The results show that the values of R and D increase with increasing RBoe/Re.
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Received: 2007-09-28
Accepted: 2007-12-29
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Corresponding Authors:
WANG Da-jian
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