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.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
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
关键词
SEELFS
EXAFS
固体碱
镁铝复合氧化物
结构
SEELFS (Surface Extended Energy Loss Fine Structure), EXAFS(Extended X - ray Absorb Fine Structure) , Mg- Al mixed oxides
