| 温度对焙烧Mg-Al水滑石体相结构和表面性质的影响 |
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| 引用本文： | 李大塘,董奇志,罗娟,郭军. 温度对焙烧Mg-Al水滑石体相结构和表面性质的影响[J]. 湘潭大学自然科学学报, 2000, 22(1): 42-45 |
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| 作者姓名： | 李大塘 董奇志 罗娟 郭军 |
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| 作者单位： | 湘潭师范学院化学系,湖南,湘潭,411201 |
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| 基金项目： | 湖南省自然科学基金!(NO:98JJY2057)，湖南省教委资助课题 |
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| 摘 要： | 研究了焙烧温度对焙烧MgAl水滑石体相结构和表面性质的影响 .在 6 73K、873K和 10 73K温度下焙烧样品的MAS2 7Al核磁共振结果呈现显著的物相转变 ,其转变中的过渡态对确定样品表面酸碱性质显得很重要 .XPS测定样品中Al2S和O1S结合能与样品表面酸碱中心的强度相关
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| 关 键 词： | 温度 镁－铝水滑石 表面性质 体相结构 |
Influence of Calaination Temperature on Bulk Structure and Surface Acid and Base Properties of Calained Mg-Al Hydrotalcites |
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| LI Da-tang,DONG Qi-zhi,LUO Juan,GUO Jun. Influence of Calaination Temperature on Bulk Structure and Surface Acid and Base Properties of Calained Mg-Al Hydrotalcites[J]. Natural Science Journal of Xiangtan University, 2000, 22(1): 42-45 |
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| Authors: | LI Da-tang DONG Qi-zhi LUO Juan GUO Jun |
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| Abstract: | This paper describes the influence of calcination temperature on the bulk structure and surface properties of the calained hydrotalcite with Mg/Al amountofsubstance ratio of 3 . Results of solidstate magicangelspinning 27 Al NMR,revealed that significant phase transitions occur in the samples upon calcination at 673 K,873 K, 1 073 K, respectively. These transitions seem very important to determination of the surface acid/base properties for the samples. Furthermore,the binding energies of Al 2S and O 1S of the samples determined by XPS are found to be proportional to the strength of surface acid and base sites of the samples |
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| Keywords: | calained hydrotalcite bulk structure transitions solid-state MAS ~27Al NMR XPS |
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