| 微波法研制碱土金属氧化物负载型MCM-48碱性介孔材料 |
| Preparation of Basic MCM-48 Mesoporous Materials Loaded Alkaline Earth Oxides through Microwave Radiation |
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| 摘要: 以立方相介孔分子筛MCM-48为载体,用微波辐射分散MgO或CaO和醋酸镁溶液浸渍等方法研制碱性介孔材料。MCM-48能经受微波辐射,负载碱性客体之后也保持介相结构。异丙醇分解探针反应表明:载体本身没有碱催化活性,而碱性MCM-48介孔材料的活性随温度升高而提高。本文还对介孔材料在微波分散和碱性催化方面的特点进行分析。 |
| 关键词: MCM-48 氧化镁 氧化钙 微波辐射 碱性介孔材料 |
| 基金项目: |
| Abstract: Cubic mesoporous molecular sieves MCM-48 were synthesized under basic conditions and a more stable MCM-48 sample was obtained after hydrothermal post-synthetic treatment. Their basic derivatives were prepared by use of microwave radiation induced dispersion of magnesia or calcium oxide, impregnation with magnesium acetate solution, and ion exchange with cesium nitrate solution. Among them the method of microwave radiation induced dispersion on the support was a facile and an environmental benign one. After modifications, the derivatives still maintained cubic mesophase of MCM-48s as proved by X-ray diffraction data. The basic activities of these derivatives were evaluated by the decomposition of 2-propanol as probe reaction in which the parent sample was feeble to yield acetone owe to no basic activity. As expected, the derivatives showed good basic catalytic activity and gained a considerable yield of acetone depending on reaction temperature and the amount of basic sites. The application of microwave radiation on the preparation of basic mesoporous materials was discussed in comparison with the other methods. |
| Keywords: MCM-48 magnesia calcium oxide microwave radiation basic mesoporous materials |
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| 摘要点击次数: 1192 |
| 全文下载次数: 1995 |
| 颜学武,韩小伟,曹毅,魏一伦,朱建华.微波法研制碱土金属氧化物负载型MCM-48碱性介孔材料[J].无机化学学报,2002,18(11):1101-1106. |
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