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- W2379815295 abstract "Using cerium carbonate,lanthanum oxide and manganese nitrate as raw materials,Ce-La-Mn aerogel was prepared by sol-gel method combined with supercritical drying technology,and ultrafine particles of Ce-La-Mn mixed oxides were got after heat treatment at 850℃.The prepared materials were characterized by TG-DTA,XRD,FT-IR and TEM.The catalytic properties of ultrafine Ce-La-Mn mixed oxides were tested by reaction 2CO+2NO=2CO2+N2.The key aim was to examine the effect of supercritical fluid drying technology and Ce-doping on ultrafine Ce-La-Mn mixed oxides′ crystal structure,morphology and catalytic activity.The results show: at 260℃,Ce-La-Mn mixed oxides was brown loose flocculent powder with good dispersibility.The particles were spherical about 10nm in size.The main crystal components were CeO2,MnO,La5O7NO3 and La(OH)2NO3.After thermal treating at 850℃,Ce-La-Mn mixed oxides were made up of lots of quasi-global grains smaller than 20nm;the main crystal components of the Ce-La-Mn mixed oxides were LaMnO3+λ,La2O3 and CeO2;heat treatment could enhance the crystallinity of the materials.Ce-doping increased the oxygen vacancies of LaMnO3+λ lattice,improved the condition of redox catalysis,effected the migration of the perovskite lattice oxygen and advanced the catalysis activity of Ce-La-Mn mixed oxides." @default.
- W2379815295 created "2016-06-24" @default.
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- W2379815295 date "2012-01-01" @default.
- W2379815295 modified "2023-09-24" @default.
- W2379815295 title "Preparation,Characterization and Catalytic Property of Ce-La-Mn Ultrafine Particles" @default.
- W2379815295 hasPublicationYear "2012" @default.
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