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《過渡金屬氧化物催化劑上丙酮的氧化分解》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、金梅過渡金屬氧化物催化劑上丙酮的氧化分解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夠ofdiffractionpeak掣Dws．TheTG—DSCspectraofMn(N03)2／ZR02showthatthereisamajorendothermicpeakwithoutqualitylossduring5206C-720"C．CombinedwiththeXRDreset,itWasobtainedthatthepeakisfromthechangeofamorpho
7、ustocrystalMn203．TheUV-Ramanresultsdiscoveredthatwhenmanganesenitrateloadonthezirconiumoxide，thetemperatureofmanganese一4揚(yáng)州大學(xué)碩士學(xué)位論文nitratedecomposedintoMn20aspeciesdropped．IRresultsshowedthatafterloadingofmanganese，thestretchingvibrationabsorptionfrequenciesofZr-Obondmoved
