| 模板法制备介孔氧化铝及Eu3+离子组装 |
| Template Synthesis of Mesoporous Alumina Powder and Eu3+ Assembly |
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| 摘要: 通过溶胶-凝胶法，以三嵌段共聚物F-127为模板制备有序介孔氧化铝(P-Al2O3)粉末，用热失重分析、X射线粉末衍射(XRD)、低角X射线粉末衍射(LAXRD)和比表面测量仪进行物相分析与孔径分析，利用高倍透射电子显微镜(HRTEM)表征介孔材料的形貌。研究表明，40 ℃下制备的介孔氧化铝经过高温除模板后，孔径大小分布较集中，有序性好。进一步通过水热反应法，获得了Eu3+的P-Al2O3组装体。研究了组装体系的光谱特性，并观察到介孔氧化铝基质与客体离子Eu3+之间产生的能量传递现象。 |
| 关键词: 模板法 介孔 能量传递 溶胶-凝胶法 |
| 基金项目: |
| Abstract: One-dimensional mesoporous aluminum oxide powder was prepared by sol-gel process with co-assemebly of Pluronic F-127 as the template and characterized by XRD, TEM, Low angle x-ray diffraction(LAXRD), HRTEM and low temperature nitrogen adsorption-desorption. Eu3+ ion was introduced into the voids of mesoporous aluminum oxide powder by hydrothermal reaction, and the spectra of P-Al2O3∶Eu3+ was discussed. Under 254 nm light excitation, the characteristic red emission peaks of Eu3+ ions were observed. The peak at 614 nm is due to the 5D0→7F2 electric dipole transition of Eu3+, and its intensity is extremely stronger than that of the 5D0→7F1 transition, indicating that the Eu3+ ions located in the host lattice have lower symmetry. The energy transfer of Al2O3 to Eu3+ in mesoporous Al2O3 was observed. |
| Keywords: template synthesis mesophases mesoporosity energy transfer sol-gel method |
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| 杨 泠,黄亚林,容建华,刘应亮.模板法制备介孔氧化铝及Eu3+离子组装[J].无机化学学报,2008,24(9):1412-1416. |
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