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化学学报
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化学学报 ›› 2000, Vol. 58 ›› Issue (7): 909-911. 上一篇    下一篇

研究论文

SEELFS对Mg-Al复合氧化物结构的研究

黄小华;黄惠忠;江德恩;赵璧英;刘载维   

  1. 北京大学物理化学研究所.北京(100871)
  • 发布日期:2000-07-15

Investigation of the structures of Mg-Al mixed oxides by SEELFS

Huang Xiaohua;Huang Huizhong;Jiang Deen;Zhao Biying;Liu Zaiwei   

  1. Beijing Univ, Inst Phys Chem.Beijing(100871)
  • Published:2000-07-15

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435

被引次数

8 | 1

应用EXAFS类似原理，对MgO和Mg-Al复合氧化物[Mg(Al)O]中Mgk-边的SEELFS(SurfaceExtendedenergyLossFineStructure)一阶微分谱进行数据处理，得到了Mg近邻原子的配位距离。研究发现，同MgO比较，由于Al^3^+的引入，使[Mg(Al)O]中的Mg－mg配位距离增加，配位数降低，而Mg－O的配位环境基本不变。

关键词: 氧化镁, 氧化铝, 复氧化物, 外延X射线吸收精细结构谱

SEELFS mechanism was outlined and the Fourier transform function of Mg k- edge of MgO and Mg(Al)O were obtained after the data analysis of the SEELFS features. The peaks attributable to the Mg－O shell of two compounds were similar, whereas the peaks attributable to the Mg－ Mg shell varied in the intensities and positions due to the introduction of Al^3^+ at nearest-neighbour.

Key words: MAGNESIUM OXIDE, ALUMINIUM OXIDE, DOUBLE OXIDE, EXTENDED X-RAY ABSORPTION FINE STRUCTURE SPECTROSCOPY

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