Acta Phys. -Chim. Sin. ›› 1995, Vol. 11 ›› Issue (02): 175-179.doi: 10.3866/PKU.WHXB19950216

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The Study on Structures of CaO-La2O3 Catalysts by Fluorescence Emission of Eu3+

Ji Min, Bi Ying-Li, Zhen Kai-Ji, Xu Yu-Hua, Wei Quan   

  1. Department of Chemistry,Jilin University,Changchun 130023|The Chentre of Analysis and Testing,Jilin University,Changchun 130023
  • Received:1994-01-15 Revised:1994-04-25 Published:1995-02-15
  • Contact: Ji Min

Abstract:

The C2 selectivity of catalyst La2O3 in oxidative coupling of methane may be increased by doping small amount of CaO. Some experimental techniques were adopted such as measurement of fluorescence emission of Eu3+ doped into La2O3, determinations of the lattice parameters and XPS of the catalysts. The doping of CaO results in an increase in ambient symmetry of La3+ and in the concentration for creating oxygen ion vacancies in La2O3.

Key words: Rere earth, Fluorescence, Oxidative coupling of methane