| 由镁、铝醇盐配合物合成纳米粒子MgAl2O4尖晶石 |
| Synthesis of Nano-sized Spinel MgAl2O4 Particle by Magnesium and Aluminum Alkoxo Complex |
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| 摘要: |
| 关键词: 电解 镁、铝醇盐 溶胶-凝胶 纳米MgAl2O4 |
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| Abstract: Mg and Al alkoxide complex was synthesized in a cell without battery separator by electrochemical dissolution of aluminum for 6 h and magnesium for 1.8 h at 45 ℃ in ethanol solution of 0.04 mol·dm-3 (Bu4N)Br with a current density of 100 mA·cm-2. IR and Raman spectroscopy were used to characterize the structure of the precursor of MgAl2O4. The results show that the current efficiency attains 98.4% and the precursor is MgAl2(OCH2CH3)5(acac)3. The acac- group-containing precursor could prevent it from agglomeration. The xerogel was obtained by drying in vacuum for 24 h and hydrolysis under pH≈8.5 of the precursor, which was heated at 350 ℃ for 2 h to obtain the nano-MgAl2O4 powder. XRD and TEM were used to investigate the structure of nano-MgAl2O4. The result suggests that the xerogel with an average particle size of 10 nm and the Nano-sized Spinel MgAl2O4 Particle of 12 nm thus obtained are with high purity. |
| Keywords: electrolysis Mg and Al alkoxide sol-gel nano-sized MgAl2O4 |
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| 朱其永,王凤武,褚道葆.由镁、铝醇盐配合物合成纳米粒子MgAl2O4尖晶石[J].无机化学学报,2007,23(7):1282-1286. |
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