核壳结构四氧化三铁@二氧化硅作为荧光剂

HindawiPublishingCorporationJournalofNanomaterialsVolume2013,ArticleID178138,7pageshttp://dx.doi.org/10.1155/2013/178138ResearchArticleAFluorescentSensorforZincDetectionandRemovalBasedonCore-ShellFunctionalizedFe3O4@SiO2NanoparticlesYaohuiXu,1,2YangZhou,1,2WenhuiMa,1,2andShixingWang11FacultyofMetallurgicalandEnergyEngineering,KunmingUniversityofScienceandTechnology,Kunming650093,China2NationalEngineeringLaboratoryforVacuumMetallurgy,KunmingUniversityofScienceandTechnology,Kunming650093,ChinaCorrespondenceshouldbeaddressedtoYangZhou;zhouyangnano@163.comReceived11December2012;Accepted5January2013AcademicEditor:TaoChenCopyright©2013YaohuiXuetal.ThisisanopenaccessarticledistributedundertheCreativeCommonsAttributionLicense,whichpermitsunrestricteduse,distribution,andreproductioninanymedium,providedtheoriginalworkisproperlycited.ThemagneticFe3O4@SiO2nanoparticles(NPs)functionalizedwith8-chloroacetylaminoquinolineasafluorescentsensorfordetectionandremovalofZn2+havebeensynthesized.Thecore-shellstructuresofthenanoparticlesandchemicalcompositionhavebeenconfirmedbyTEM,XRD,FTIR,andXPStechniques.TheadditionoffunctionalizedFe3O4@SiO2NPsintotheacetonitrilesolutionofZn2+hadaneffectofvisualcolorchangeaswellassignificantfluorescentenhancement.High-saturatedmagnetizations(24.7emu/g)offunctionalizedFe3O4@SiO2NPscouldhelptoseparatethemetalionsfromtheaqueoussolution.ThemagneticsensorexhibitedhighremovalefficiencytowardsZn2+(92.37%).Inthiswork,weprovidedaneasyandefficientroutetodetectZn2+andsimultaneouslyremoveZn2+.1.IntroductionZincion,asbiologicallyimportantmetalions,playsavitalbiologicalroleinvariouspathophysiologicprocesses,suchasgeneexpression,cellapoptosis,enzymaticadjustment,andneurotransmission,becauseofitsstructuralproperties[1–3].Toxicinexcessorabsence,thebreak-upofzincionhomeostasismaycausepathologyofintellectualdevelop-mentandotherneurologicalproblemssuchasAlzheimer’sandParkinson’sdiseases[4,5].Therefore,theanalyticalapproachestodetectZn2+havebeenstudiedintensively.Sofar,manys