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聚间苯二胺空心纳米球银颗粒负载poly(m-phenylenediamine) hollow spheres
聚间苯二胺空心纳米球负载银纳米颗粒用于过氧化氢的电化学超灵敏检测
ElectrochimicaActa98 (–108
ContentslistsavailableatSciVerseScienceDirect
ElectrochimicaActa
journalhomepage:/locate/electact
SynthesisofAgnanoparticles-decoratedpoly(m-phenylenediamine)hollowspheresandtheapplicationforhydrogenperoxidedetection
ZhipingWua,SiweiYanga,ZhiChenb,TingtingZhanga,TingtingGuoa,ZhoufengWanga,FangLiaoa,*
ChemicalSynthesisandPollutionControlKeyLaboratoryofSichuanProvince,CollegeofChemistryandChemicalEngineering,ChinaWestNormalUniversity,Nanchong637002,Chinab
SchoolofChemistryandEngineering,ChongqingUniversityofTechnology,Chongqing400050,China
Articlehistory:
Received22January2013
Receivedinrevisedform7March2013Accepted7March2013Available online xxx
HollowspheresPmPD
Silvernanoparticle
Hydrogenperoxidedetection
Poly(m-phenylenediamine)(PmPD)hollowspheresweresynthesizedforthefirsttimeviachemicalpolymerizationofm-phenylenediamine(mPD)monomersbyusingammoniumpersulfate(APS)astheoxidizingagentin10oC.Agnanoparticles(AgNP)wasreducedonthehollowspheresPmPDbyanAgNO3aqueoussolutioninthepresenceofNaBH4.TheAgnanoparticle-decoratedpoly(m-phenylenediamine)colloids(AgNP-PmPD)exhibitremarkablecatalyticperformancetowardH2O2reduction.Thecorrespond-inglinearrangeanddetectionlimitareestimatedtobefrom0.1mMto10mM(r=0.999)and0.88?Matasignal-to-noiseratioof3.
(C) 2013 Elsevier Ltd. All rights reserved.
1.Introduction
Hydrogenperoxidetakespartinawiderangeofenzymaticreac-tions,playinganimportantroleinthefieldsofchemistry,biology,clinicalcontrolandenvironmentalprotection.Therefore,itisveryimportantforrapid,accurate,reliableandreagentlessdetermina-tionofhydrogenperoxide[1–3].Manydetectiontechniqueshavebeenwelldeveloped[4–9],suchastitrimetry,photometry,chemi-luminescenceandelectrochemistry.Amongthem,electrochemicaltechniquehasbeenproventobeacheapandeffectivewayduetoitsintrinsicsimplicity,wellsensitivityandgoodselectivity.MostofthissubjectwiththeparticipationoftheenzymecanspeeduptheelectrontransferbetweentheelectrodesandH2O2[10,11].Butitsapplicationislimitedbecausetheenzymeisexpensiveandeasytodenature.Theproblemwassolvedlaterbyusingnanostructuressuchascarbonnanotubes,noblemetalnanoparticlesascatalyststocalatyzetheoxidationorreductionofH2O2[12–15].Chemicalreductionofmetalionsisthemostcommonmethods.Butmetalcolloidsaresusceptibletoirreversibleaggregationbecauseoftheirsmallsize.Aneffectivewayistoprotectcolloidswithprotectiveagentssuchassurfactants,thiols,polyelectrolytesandpolymers[16–25].Amongthem,conductingpolymerhavebeenpaidcloseattentionbyresearchersbecauseoftheirpotentialapplicationsin
opticalandmicroelectronicdevices,chemicalsensors,drugdeliv-ery,catalysesandenergystoragesystems[26–30].Amongtheconductingpolymers,polyanilineanditsderivativeshavebeenwidelyresearchedduetotheircontrollableelectricalconductivity,highenvironmentalstability,uniqueinterestingredoxpropertiescontrolledbyitsdifferentoxidation[31,32].
Inthispaper,wereportamoderateandtemplate-freemethodtosynthesisPmPDhollowspheresforthefirsttime.ThenAgNP-PmPDwaspreparedbyaddingAgNO3andNaBH4aqueoussolutiononthesuspensionofPmPD.ItisfoundthatsuchAgNP-PmPDexhibitremarkablecatalyticperformancetowardthereductionofH2O2.Thecorrespondinglinearrangeanddetectionlimitwasestimatedtobefrom0.1mMto10mM(r=0.999)and0.88?M.
2.Experimental
2.1.Materials
Ultrapurewaterwasusedanditsresistivitywas>18M?cm.AgNO3,KH2PO4,Na2HPO4,(NH4)2S2O8,NaBH4,H2O2(30%)andmPDwerepurchasedfromChengduKeLong.Allchemicalswereofanalyticalgradeandusedwithoutfurtherpurification.
2.2.SynthesisofPmPDhollowspheres
*Correspondingauthor.Tel.:+;fax:+.E-mailaddress:(F.Liao).
TypicalsyntheticprocessesofPmPDhollowsphereswereasfollows:1.5gmPDwasaddedto10mLdeionizedwaterand
/$–seefrontmatter(C) 2013 Elsevier Ltd. All rights reserved.http://dx.doi.org/10.1016/j.electacta.
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