多级微纳米结构含铁化合物的控制合成及其性能-研究

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1、AbstractInrecentyears，hierarcNcalmicro·／nanostructures谢mpeculiarmorphologiesandstructures，constructedbytheself-assemblyoftheselow—dimensionalbuildingblocks，havereceivedmoreandmoreattention．Thesehierarchicalmicro一／nanostructuresnotonlyshowthepropertiesofllano

2、--structuredunit,butalsoshowthepropertiesgenerat—edbythecouplingeffectsandsynergieseffects．Asaresult，theyexhibitdistinguisha-bleelectric，magnetic，optical，thenrmody’namicandmechanicalproperties．Thesynth—esisandself-organizationofmicro—andnanoscaleinorganicmat

3、erialswimspecialmot-phology,size，andhierarchybecomethefoundamentalfordesignandinvestigationno-velnanodevices．Varioussyntheticmethodshavebeendevotedtothecontrolledsynthesisofhierar-cmcalmicro一／nanostructureswithspecificsizesandmorphologies．Amongthem，solution—

4、phasesyntheticmethodshavemanyadvantages，includingrelativelylowreactiontern-peratures，convenienceinhandling，inexpensivereactioninstruments，andeaseinproc—eduralcontrol，makingthemverypromisingforthelargescalesynthesisofmaterials．Inthisthesis，severalfacile，cost-

5、efficientandenvironmentally—friendlyaqueoussolutionroutesweredevelopedforthesynthesisofflower-likehierarchicalmicro-·／nanostructure·-s．undermildconditions．Themaincontentsareasfollows：1．Inthisarticle，flower-like11iemrcllicalferrihydritemicrostructureswereprep

6、aredbythesimpleoxidationandhydrolysisofferricsulphateheptahydrate(FeS04’7H20)inthepresenceofthecitrateionasashape—directing／cappingagentatrooITltemperature．Owingtothelessexpensiveandnontoxicrawreactionmaterials，especiallywaterasthesolvent，Ourmethodrepresents

7、aneconomicandgreenapproachforthecontrolle—dsynthesisofflower-likehierarchicalferrihydrite．Flower-likehierarchicalferrihydritemicrostructuresexhibitenhancedphotocatalyticactivity,duetoitsnovelhierarchicalP-orousstructure，highersurfaceareaandcitratemodificatio

8、n，possessbetteradsorptionandphotocatalyticabilities．2。13-FeOOHmicrostructures、Ⅳi也flower-likemorphologiesweresuccessfullysyn-thesizedbyafacile5-sulfosalicylicaciddihydrate(SSA)·assistedhydrotherm