水溶性超順磁鐵氧體單分散納米結(jié)構(gòu)的合成.pdf

1、中國(guó)科學(xué)技術(shù)大學(xué)碩士學(xué)位論文水溶性超順磁鐵氧體單分散納米結(jié)構(gòu)的合成姓名：程威申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：無(wú)機(jī)化學(xué)指導(dǎo)教師：唐凱斌20100401ABSTRACTSpinelferritesshowimportantapplicationsintheareaofbiomedicine，magneticfluid，magneticresonanceimageandSOonTopromotetheapplicationsofferritesint

2、hoseareas，itisnecessarytosynthesizemonodispersesuperparamagneticnanostructuredferritesparticleswithhighsaturationmagnetizationInaddition，inorganicmaterialswithhollowstructurehaveattractmuchattentionduetotheirpromisingapp

3、licationsinthefieldofdrugdeliverycatalyst，photoniccrystals，LibatteryetcThisdissertationworks011preparationofmonodispersesuperparamagneticnanostructuredferritesparticleswithhighwatersolubilityandhighsaturationmagnetizatio

4、nbyasimpleonepotmethodMoreoveraligandassisteddissolutionprocesshasbeendevelopedforthesynthesisofhollowcoppertungstenoxidehydroxideThemainpointsofthisdissertationaresummarizedaSfollows：1Monodispersehollowandcoreshellmagne

5、tite(Fe304)sphereshavebeenpreparedbyasimpleonepotmethodbasedonhydrothermaltreatmentofFeCl3，citratepolyacrylamideandureaTheresultsofcontrolexperimentsrevealthatcitrateandpolyacrylamidearecrucialfortheformationofsphericalp

6、roductandthewellknownOstwaldripeningprocessisresponsibleforthetransformationfromsolidspherestohollowandcoreshellspheresInthissynthesissystem，citrateservesasaligandandreducingreagents，polyacrylamideworksaSastabilizerllrea

7、providesallalkalineatmosphereforthesynthesissystemThehollowandcoreshellmagnetitespheresareporousandhighlywatersoluble。Theyexhibitsuperparamagneticpropertieswithrelativelyhighsaturationmagnetizationatroomtemperature2Unifo

8、rmferritesM1xFe，xFe204(M=Zn，Mg，Mn，Ni；0X1)colloidalspherescomposedofalargenumberofnanocrystalshavebeenpreparedbyasimpleone。stephydrothermalrouteInthissynthesissystem，thecompositionandsize(100240nm)oftheferritescolloidalsp

9、heresCanbetunedbychangingthesyntheticparametersTheaspreparedferritescolloidalspheresshowsuperparamagneticpropertywithrelativelyhi啦saturationmagnetizationatroomtemperatureIncreasingthecontentsofZninZnferritescolloidalsphe

10、reswillleadtothedecreaseofsaturationmagnetizationoftheZnferritecolloidalspheresZnferritecolloidalspheresCanbedispersedinaqueoussolutionforminghighlystablecolloidalsuspensionEspeciallytheZno4lFe059Fe204colloidalspheresaqu