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1、摘要PreparationandCatalyticPerformanceofSilVerNanoparticleCatalystsSupportedonLayeredD0ubleHydroxidesAbstractOlefin印oxidation,especiallyinthecaseofstyrene,hasatt】?actedincreasinginterestinthefieldsofscienceandindustrialapplication.Recentlyrapidlyrevolvedgreenchemistrymakesitnecessary
2、todevelopahighlye伍cientandfairlyf.a(chǎn)cileoxidantmethodforthe印oxidationofstyrene.SuppoIrtedsilvercatalystshavebeenwidelyinVestigatedbecauseofthehi曲catalyticpeI.
3、’onnanceofolefin印oxidation.Layereddoublebydroxides(LDHs),alsokno、Ⅳnashydrotalcite—likemat舐als,areaclassofpromisingcatalystsa
4、ndsupports.LDHstructureisbasedonbmcite(Mg(0H)2)-likelayersinwhichsomeofmedivalentcationshavebeenreplacedbytriValentcationsgiVingpositiVely-cha略edsheets,endowingLDHswithordered眥ayofhydroxylsitesonsu渤cewhichisabletof.a(chǎn)vorOle丘n印oxidation.Inthispresentstlldy,Ag/LDHscatalystswaspr印aredu
5、singafacilechemicalreductionmethod,andtheninVestigatedfortheactivi夠andselectivityofthepreparedcatalystsintheliquid-phase印oxidationofstyrene.Themainresultsobtainedareasfollows:1.Usingachemicalreductionmethod,wepr印aredAg/LDHwithdifferentloadingwithAghighlydispersedonthesupport.Bychan
6、gingthepr印arationmethod,wepr印aredA∥LDHcatalystViaroastreductionprocess.IlI北京化工大學碩士學位論文EValuationof印oxidationofstyreneshows也attheAgnanopaniclesinou.rcaseexhibitedahighlyenhancedperfomanceincomp撕sonwiththatpr印aredViaaconVentionalroastreductionprocess.2.ByVaryingreactiontimeandreactio
7、nteIllperatureofA∥LDHscatalystsintheliquid-phase印oxidationofstyrenebyTBHP,theconVersionsofstyreneweremned.ApropercatalyticconditionwiththeoptiInumconVersionofstyreneandtheselectiVityofstyreneoxidewasoptimizedtobeareactiontimeof8haJldareactionteIIlperatllre82℃.KEYWOItDS:Layereddoubl
8、ehydroxide,silVercatalyst,0lefin印oxidation,styrene,catalyticactiVityⅣ目錄第一章緒論1.1銀催化劑概述???????????????????????????l1.1.1銀催化劑發(fā)展簡史???????????????????????11.1.2銀催化劑的制備方法??????????????????????l1.1.3銀催化劑的催化性能??????????????????????41.2復合金屬氫氧化物(LDHs)的研究概況????????????????·71.2.1LDHs及其衍生物的概述?
9、???????????????????·71.2.2