掺杂Er的三维有序大孔LaMnO3的制备及其应用研究

Preparation and Catalytic Performance of Three-dimensionally Ordered Macroporous Er-doped LaMnO3 for Methane Combustion

天然气(主要成分是CH4)是21世纪的主要能源之一,CH4未完全燃烧产生的CO会造成严重的环境污染,加剧大气温室效应。钙钛矿型氧化物(ABO3)作为甲烷燃烧的催化剂,具有很好的催化性能和良好的热稳定性。本文以聚甲基丙烯酸甲酯(PMMA)为模板,以硝酸镧、硝酸锰、P123(聚环氧乙烷-聚环氧丙烷-聚环氧乙烷三嵌段共聚物)、甲醇与聚乙二醇的混合液作为前驱液,掺杂不同比例稀土元素铒(Er),制备三维有序大孔(3DOM)单相菱形晶系中空骨架的钙钛矿型氧化物La1-xErxMnO3(x=0.01、0.03、0.05)材料。采用SEM等分析方法对La1-xErxMnO3催化剂进行了表征,研究了该材料催化甲烷燃烧的活性。

Natural gas(mainly CH4)is one of the main energy sources in the 21st century.CO produced by incomplete combustion of CH4 will cause serious environmental pollution and aggravate the greenhouse effect.Perovskite-type oxides(ABO3)as catalysts for methane combustion have good catalytic performance and good thermal stability.In this paper,three-dimensional ordered macroporous(3DOM)single-phase diamond was synthesized by doping rare earth element Er with lanthanum nitrate,manganese nitrate,P123(polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer),methanol and polyethylene glycol(PEG)as precursors and using polymethyl methacrylate(PMMA)as template.Perovskite type oxides La1-xErxMnO3(x=0.01,0.03,0.05)materials of crystalline hollow framework.SEM was used to characterize the La1-xErxMnO3 catalyst,and its catalytic activity for methane combustion was studied.