SEELFS对Mg-Al复合氧化物结构的研究  

Investigation of the Structures of Mg-Al Mixed Oxides by SEELFS

作　　者：黄小华[1] 黄惠忠[1] 江德恩[1] 赵璧英[1] 刘载维 

机构地区：[1]北京大学物理化学研究所,北京100871

出　　处：《化学学报》2000年第7期909-911,共3页Acta Chimica Sinica

基　　金：国家自然科学基金(29733080);国家攀登计划资助

摘　　要：应用EXAFS类似原理,对MgO和Mg-Al复合氧化物[Mg(Al)O]中Mg k-边的SEELFS(Surface Extended EnergyLoss Fine Structure)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.SEELFS mechanism was oudined 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 Al3+ at nearest - neighbour.

关 键 词：SEELFS EXAFS 固体碱 镁铝复合氧化物 结构 

分 类 号：O614[理学—无机化学]