催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (9): 1465-1468.DOI: 10.1016/S1872-2067(10)60257-4

• 研究论文 • 上一篇    下一篇

Synthesis, Characterization, and Catalytic Activity of Nanocrystalline La1-xEuxFeO3 during the Combustion of Toluene

Seyed Ali HOSSEINI1,*, Mohammad Taghi SADEGHI-SORKHANI2, Leila KAFI-AHMADI2, Abdolali ALEMI2, Aligholi NIAEI1, Dariush SALARI1   

  1. 1Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran; 2Department of Inorganic Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran
  • 收稿日期:2011-04-13 修回日期:2011-06-03 出版日期:2011-09-09 发布日期:2015-01-24

Synthesis, Characterization, and Catalytic Activity of Nanocrystalline La1-xEuxFeO3 during the Combustion of Toluene

Seyed Ali HOSSEINI1,*, Mohammad Taghi SADEGHI-SORKHANI2, Leila KAFI-AHMADI2, Abdolali ALEMI2, Aligholi NIAEI1, Dariush SALARI1   

  1. 1Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran; 2Department of Inorganic Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran
  • Received:2011-04-13 Revised:2011-06-03 Online:2011-09-09 Published:2015-01-24

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摘要： Nanostructured LaFeO3 and substituted La1-xEuxFeO3 (x = 0.1, 0.15, and 0.2) perovskites were synthesized by sol-gel auto-combustion and their activities during the combustion of toluene were evaluated. The structure and physico-chemical properties of the perovskites were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and BET surface area analyses. The compounds were crystallized as a perovskite phase with an orthorhombic structure. The mean particle size of the perovskites increased with an increase in europium loading while the specific surface area decreased. Characterization data confirmed that a total insertion of Eu into LaFeO3 occurred at x ≤ 0.15. However, Eu2O3 segregation occurred to some extent especially at x >0.15. The catalytic activity of the catalysts increased substantially with an increase in Eu substitution in the evaluated range.

关键词: perovskite, sol-gel, europium, volatile organic compounds, catalytic oxidation

Abstract: Nanostructured LaFeO3 and substituted La1-xEuxFeO3 (x = 0.1, 0.15, and 0.2) perovskites were synthesized by sol-gel auto-combustion and their activities during the combustion of toluene were evaluated. The structure and physico-chemical properties of the perovskites were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and BET surface area analyses. The compounds were crystallized as a perovskite phase with an orthorhombic structure. The mean particle size of the perovskites increased with an increase in europium loading while the specific surface area decreased. Characterization data confirmed that a total insertion of Eu into LaFeO3 occurred at x ≤ 0.15. However, Eu2O3 segregation occurred to some extent especially at x >0.15. The catalytic activity of the catalysts increased substantially with an increase in Eu substitution in the evaluated range.

Key words: perovskite, sol-gel, europium, volatile organic compounds, catalytic oxidation