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1、ABSTRACTfotmdthatNaBI-hnotonlyactsasaprecipitatingagent，butalsoprdvidesacontinuousdisturbanceoftheenvironmentforthisreaction．HighsurfaceenergyofinitiallyformedZr02nucleiandkineticdisturbancegeneratedfromtheHEbubblesarebelievedtobethedrivingforcesforthegrowthandassemblyofZr02particle
2、sanddirectlyaffectsthemorphology,thecrystallinephaseandtextureperformanceofZr02．Inotherwords，whenthecolloidmillslitwidthandspeedisconstant，themorphology,crystalphaseandtexturepropertiesofZr02CanbecontrolledbytheconcentrationofNaBH4．However,ourpurposeistof'mdanewfacilescale·-upmethod
3、forthesynthesisofMicro／meso·-porousmorphology—controlledtetravalentmetaloxidenanomaterials．Inthebasisoffeasibility,weneedtoprovetheuniversality．Afterthat，wetakeadvantageofthisnewmethodtosynthesizeCe02(291．2m291specificsurfacearea)andTi02(186．1m291specificsurfacearea)successfully，ofw
4、hichspecificsurfaceareaalemuchhigherthantheconventionalmethodpreparation．Althoughothertetravalentmetaloxidepreparationsaleongoing，theuniversalityofthisapproachhasbeenpreliminarilyverified．2．Thismethodisnotonlysuitableforpreparationofsinglemetaloxide，butalsoforpreparationofmultipleme
5、talandmetaloxide．ThenewZr02-Ni(OH)2compositeoxidewithhighspecificsurfaceareaof263．5m2g-1WassynthesizedbyhydrothermalmethodofdynamicIU北京化工大學(xué)碩士學(xué)位論文controlled．AndwepreparedtheAu／Zr02一Ni(OH)2catalystbyNaBI-14directreductionmethodanditwasappliedtothecatalyticoxidationofbenzylalcoh01．Thec
6、atalyticactivitywassignificantlyhigherthanthatofAu／Zr02．ThroughtheanalysisofTPDandXPSspectra,synergisticeffectWasfoundbetweenthedopedNi(OH)2andZr02whichenhancedthebasicsitesonthecatalystsurface．Thestrongerbasicsites，themorefavorableoxidationofbenzaldehyde，andthusimprovingcatalyticac
7、tivity．KEYWORDS：tetravalentmetaloxides，nucleationandcrystallizationseparationmethod，kineticallycontrolled，compositeoxidesupport，theoxidationofbenzylalcohol目錄第一章緒論??????????????????????11．1納米材料????????????????????????????．11．1．1納米材料的概念??????????????????????．．11．1．2納米材料的應(yīng)用前景??????????
8、??????????一21．2多孔材料
