功能化CdS纳米晶的制备
x”毒口献料’料2006年第2期(37)卷
——==二.———————.———一————————P——————————————————————__———————————————————?—————————————————————————————————————。————————————————————————————一SynthesisoffhnctionalizedCdSnanocrystals
sHENYong-fcn92,cHENsul仙,cHENLi2
(1.KeyLaboraco‘yofMatedaLofieⅡtedchemiCalE“gineeri“gofJia‘峪uProVince,Nanjing210009,cmiml2sch001ofchemistryandchemicaIEn舒neeri“g,Nanjinguniversi‘yofTechrlology,Na啊i“g210009,china)
Abst伸ct:CadmiumchIorideandsodiumsulfidewereemployedasrawmaterialstopreparehydroxylcoat甜andsizetunableoiSnanocrystalinthepresenceof2一mercaptoethanol(ME)asorganicligand.Differentratios
ofME/Cd抖andH20/DMFwereper—formedtoexaminetheeffectsoftheo耀anicligandands01ventsontheresultingparticlessize.Thespherical衄noparticlespfe。
paredwerewe儿dlspcrscdinHzo/DMFs01utionwithouta“yaggregate,whichwasconfirmedwithtransmissbnelectronmicros。
copy(TEM).Fouriertransforminfrared(FT-IR)spectrashowedthathydfoxylgroupwascoatedonthesurfaceo{nanocrys协l8uccessfully.X-raydiffraction(XRD)characterizatjonrevealed
thecubicphasewa8predomjnantinthefunctionalizedCdSnano—crygtal.
Key
words:‘)dS腑ⅡocrystalIor罟alItc¨g髓d;sizetunabIe
CLCnumber:()613;0614Do伽ment∞de;AArticIeID:l001-9731(2006)02一0322—031Introduction
Recently,synLhesisofnanocrystalshasattractedmuchattentionduetotheirstrongsize—dependentproper—tiesandspecialopticaIandelectronicfeatures口~引.Themostpromisingpracticalapplications。fnanocrystalsareorganic_inorganicpolymernanocomposites,whichcanapplyinmoleculareIectronics,optics,photoelectrochem—icalcells,andsolvent—freecoatings[恤引.However.itseemstobedifflculttowelldispersenanoparticlesintonanocompositesduetotheirstrongtendencyofagglomerationamongparticles.Inview。fthis,assemblyoffunctionalizednanopaniclesintocontrolledstructureisattractingmoreandmoreinterests.Progressinnewas—semblytechniquesmakesitpossibletosynthesizewell—definedPolymer_nanoparticlenano-compositeswithnoveIpropertiesandcontrolledarchitectures[8’引.Theeffectiveassemblyoforganic_inorganicm。lecuIesnotonlycon—trolstheino‘ganicnanoparticlesizeinsitu,butalsoallowsinorganicnan。particlestohavethefunctionalizedgroup,whichcanfurtherreactwithorganicmonomersandcarryouttheassembly.
oldmiumsulfidenanocrystalisakindoftypicaIsemiconductormaterial.Manyresearchgroupshaverepor—tedthepreparationandapplicationsofthisnanocrystal[10一1“.Inthisstudy,wereporttheresultso“pr8parationandfunctionalizationofCdSnanocrystaIsbyaidofusingtheorganic1培and.ThefunctionalizedCdSnanoc。y8一tal8canbedispersedwellinorganics01ventwithoutanyflocculationduringthreemonths.Alsowecanachievethestructure蛐dpaniclesizecontrolonthefunctionalizedcdSnanocrystalsunderthismethod.ThecdSnano-crystalswerecharacterizedbyTEM,UV—visandfluorescencespectra,XRDandFT—IRspectrameasurements.2Experimental
2一mercaptoehanol(ME),cadmiumchloride(CdCl2?2.5H20)andsodiumsulfide(NazS?9H20)werepurchasedfr。mShanghaiChemicalReagentsFactoryandusedasreceived.N,N—dimethylformamide(DMF)wasdriedover0.4nmmolecuIarsievesandusedwithoutfurtherDurification.
2.5mmolofcadmiumchloridedissoIvedin3mlofdeionjzed(DI)waterwasmixedwithas01utionofME(5.OmmoI)in30mlofDMF.3mlofaqueouss01utionofsodiumsuIfide(N82S:1.67mm01)wasaddeddropwiseintotheabovesolution.TheCdSnanoparticlesthusobtainedwererecoveredbyprecipitationofthereactionmixturefromexcessD1waterandf0Uowedbycentrifugalsepa珀tion.TheseparatedslurrywaswashedthreetimeswithD1wateranddriedat90℃invacuoovernight.
Toexaminetheeffectsoftheorganic1igandandsolventsontheresultingparticlessizes,differentmoIarra—tios“ME/Cd2+andweightratiosofHzO/DMFwerecarriedout.
*F0ul山ti岫nemlNaturalScienceF0undatioⅡforHigherschoolofJiangsuProviⅡce(04l(JB430038)
Receiveddate:2005一03—25M0difieddate:2005—05—16Cor懈p佃dingaⅡthor:CHENSu
Biograplly:SHENYoIlg_feng(1073一),male,master,nlainresearchonassemblybetweeninorganicnanoparticleandorganicpolymer.
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