氧化鐵超微粒子的制備及表面包覆研究.pdf

1、東北大學碩士學位論文氧化鐵超微粒子的制備及表面包覆研究姓名：李春文申請學位級別：碩士專業(yè)：應用化學指導教師：張霞20061201東北大學碩士學位論文StudyonsynthesisandsurfacecoationofironoxidsupermicroparticlesAbstractIronoxidenanoparticlesandcoreshellparticlesexhibiteduniquephysicochemicalpro

2、perti韶inelectrics，optics，catalyzerandsensorandshowedpotentialapplicationinawidevarietyofapplications，suchasopticalabsorb，medicine，magnetismmediumandcatalysisn圮nanoaFe203andf；FeOOHmieroparticleswithdifferemshapeshavebeens

3、ynthesizedthroughstrictlycontrollingthesyntheticalconditions確eformationmechanismofsphericalctFe203nanoparticleswasinvestigatedThesurfaceelectriccharactersofnanon—Fe203and13FcOOHparticleswerestudied11∞core(spindle3FeOOVOs

4、hell(si03)particleshavebeensynthesizedtoon嵋spindle13FeOOHparticleswithdifferentlengthandpseudosphericalaFe203particlescouldbesynthesizedbythehydrolysisofFeCl3solutionindifferentconcentrationswithCTABaddedneformationproce

5、ssofpseudo—sphericalaFe203particleswasinvestigatedbyTEM，anditWasshowedthatthegrowthofnFe203particlesarethroughthediffusionmechanismTheeffectofsurfactantbexadecyltrimethylammoniumbromide(CTAB)onthisprocessalsohasbeenstudi

6、ed1r11eresultsshowedthatgrowthofthepseudosphericalnFe203particlesisn’teffectedifCTABwasaddedButbecauseoftheCTAB，hydrolyticspeedofFeCbWasgreatlyslowdownandsmallerandmoreuniformparticleswereobtained，whichwasselfassembledto

7、formtwodimesionalorderedstrucRlreThroughthemeasurementofsurfacezetapotentialunderdifferentpHvaluestheisoelectricpointofaFe203andIBFeOOHparticlesvfasobtainedItwaspH=60andpH=80respectivelysioJlj—FeOOHcoreshellparticlescoul

8、dbeobtainedbyhydrolyzingTEOSintheISFeOOHsuspensionwhichwerepretreatedbyPEI辦eIBFeOOHparticles’pretreatingtheconcentrationofadditives(amine)，thereactiontimewillaffectthestmctureofcoreshellparticlesandtheproperconditionswer