过渡金属氧化物催化剂上丙酮的氧化分解

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1、金梅过渡金属氧化物催化剂上丙酮的氧化分解3TheOxidativeDecompositionofAcetoneonTransitionMetal0xideCatalystsThecatalyticoxidativeactivityonacetonesolutionoftransitionmetaloxidessupportedonNano·zirconiawasstudiedinthispaper．Modernexperimentaltechniqueswereusedtostudyitssurfacestructurecharacters．Zr02cartierwas

2、preparedbysol-gelmethod．Zirconiumoxychlotidewastherawmmefial，usingconcentratedammoniatotin'atetheZr(OH)4gelcontrollingpHabout9．Andthenitwastremedbyaging、washing,alcoholized，filtration，dryingandcalcination．ThismethodsolvedthereductionofthecatalystssurfaceareaduringtheheatingprocessfromZr(

3、Oa)4tOZr02．UsedifferenttransitionmetalnitratesolutionsasrawmaterialswithimpregnationmethodtopreparethesupportedDano—compositeoxidativecatalysts．TEM，SEM，BET,XRD，TG-DSC，UV-RamanandIRwereusedtocharacterizethecatalysts．FromTEMandSEMresults，itWasfoundthat：homogeneouscatalystparticles，aboutthe

4、sizeof20nm，honeycombsurfaceoftheporousstructure．Itwasindicatedthatthestructureofcarrierwasstableinthepreparationprocess，withouttheeffectsofimpregnation，calcinationandotherprocesses．BETresultsshowthatspecificsurfaceareawasaffectedbytheloadingofmanganese．Withmanganese’Sloadingincreasing，th

5、especificsurfaceareadeclined．Thespecificsurfaceareavariedfrom44．2m2／gto32．9m2／g．Thereasonmightbethereuniteofactivecomponent．covetingandtheporousofcarrier’splugging．Calcinationtemperatureandtimeonthespecificsurfaceareaareofnoeffect．XRDresultsshowthatthere’SnoMn203characteristicdiffraction

6、peakat450"Ccalcination，butitappearsafter5504C．Andwiththeincreasingoftemperature，theintensi够ofdiffractionpeak掣Dws．TheTG—DSCspectraofMn(N03)2／ZR02showthatthereisamajorendothermicpeakwithoutqualitylossduring5206C-720"C．CombinedwiththeXRDreset,itWasobtainedthatthepeakisfromthechangeofamorpho

7、ustocrystalMn203．TheUV-Ramanresultsdiscoveredthatwhenmanganesenitrateloadonthezirconiumoxide，thetemperatureofmanganese一4扬州大学硕士学位论文nitratedecomposedintoMn20aspeciesdropped．IRresultsshowedthatafterloadingofmanganese，thestretchingvibrationabsorptionfrequenciesofZr-Obondmoved