纳米晶La_(1-x)Eu_xFeO_3的合成、表征及催化甲苯燃烧反应活性(英文)  

Synthesis, Characterization, and Catalytic Activity of Nanocrystalline La_(1-x)Eu_xFeO_3 during the Combustion of Toluene

作　　者：Seyed Ali HOSSEINI Mohammad Taghi SADEGHI-SORKHANI Leila KAFI-AHMADI Abdolali ALEMI Aligholi NIAEI Dariush SALARI 

机构地区：[1]Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz [2]Department of Inorganic Chemistry, Faculty of Chemistry, University of Tabriz

出　　处：《催化学报》2011年第9期1465-1468,共4页

基　　金：the Iranian Nanotechnology Initiative Council for financial support and encouragement

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.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 

分 类 号：O643.32[理学—物理化学]