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1、华中科技大学硕士学位论文Thestudiesofelectrochemicalsensorappliedinenvironmentalestrogens–nonylphenolmonitoringMaster:ZhihuiWangSupervisor:Assoc.Prof.QingLuABSTRACTWiththerapidsocialprogressandindustrialproductiondevelopment,moreandmorenegativeeffectsarebroughtintohumanlife.Inrecentyears,chemicalpol
2、lutionisserious,andarangeofenvironmentproblemsarealsofrequentlyexposed.Nonylphenol(NP)isacceptedasenvironmentaldisrupters(EEDs),whichhasbeenattractedworldwideattention.OnceNPisdischargedintotheenvironment,itwillbelongstanding.Throughthebiologicalaccumulationfunctionandfoodchain,itsdamag
3、eswillbetransferredandamplified.Thus,thedevelopmentofNPdetectionmethodissignificantforstudyingitsphysiologicalfunctionsandmakingenvironmentalhealthstandards.Inmanyofthedetectionmeans,electrochemicalmethodisextremelypopularbecauseofitsadvantages,suchasrapidresponse,goodselectivity,highse
4、nsitivity,lowexpenditure,simpleoperationwithoutcomplexsamplepreparationprocess,etc.Inthiswork,simpleandsensitiveelectrochemicalsensorsarefabricatedandthenappliedinthedetectionofnonylphenolinwaterenvironmentandfoodaspects.Themainresultsaresummarizedasfollows:Partone:Voltammetricdetermina
5、tionofnonylphenolatamulti-walledcarbonnanotubes-dihexadecylhydrogenphosphatecompositefilmmodifiedglassycarbonelectrodeInthispart,theglassycarbonelectrode(GCE)modifiedwithmulti-walledcarbonnanotubes(MWNTs)-dihexadecylhydrogenphosphate(DHP)compositefilmwasusedtodevelopaNPelectrochemicalse
6、nsor.MWNTspretreatedbyacidare8华中科技大学硕士学位论文inclinedtogettogether,becauseoftheirnegativelychargedsurface,whichmakesomeactivesitesbecovered.DHPcontainsonehydrophilicgroupandapairofhydrophobicgroups(C-Hchains),andhasasurfacewithnegativecharges.SoDHPcanhelpMWNTstobedispersedverywellandexpose
7、dtheirsurfaceactivesides.ElectrochemicalresponseofNPisenhancedonthemodifiedelectrodethanthebareone.Underoptimalconditions,theoxidationpeakcurrentofNPvarieslinearlywith-6-5itsconcentrationovertherangefrom2.0×10mol/Lto2.6×10mol/L,witha-7detectionlimitof6.0×10mol/L.Thesensorissucc
