LaZnxFe1-xO3钙钛矿型纳米催化剂的制备、表征及其甲苯燃烧性能

？NanostructuredLaFeO3andsubstitutedLaZnxFe1-xO3(x=0.01,0.05,0.1,0.2,and0.3)perovskitesweresynthesizedbythesol-gelauto-combustionmethodandusedinthecatalyticcombustionoftoluene.TheirstructuresandsurfacepropertieswereinvestigatedbyX-raydiffraction,Fouriertransmissioninfraredspectroscopy,BETsurfacearea,andscanningelectronmicroscopy.CharacterizationdatarevealedthatthetotalinsertionofzincintoLaFeO3takesplacewhenx≤0.1.However,ZnOsegregationoccurstosomeextent,especiallyatx>0.1.Theperformanceoftheseperovskiteswasevaluatedbytoluenecombustion.Thecatalyticactivityofthecatalystsincreasedsubstantiallywithanincreaseinzincsubstitution.TheseresultscanbeattributedtothecooperativeeffectbetweenLaZnxFe1-xO3andthezincoxidephases.Therelativeconcentrationofthesephasesdeterminestheiroxygenactivationabilityandreactivity.