PbS、Ag纳米材料的制备与PbS纳米材料在离子选择电极上的应用

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1、山东农业大学硕士学位论文ABSTRACTNanomaterialWaSdifferentfromanyothermaterialsintheirspeciality．ItWaSmadethemhavemanyperformancesinmagnetism，light,electricity，senseandSOon．Therefore，nanomaterialhaSwidelyusedintheseaSpects．Here，novelmethodswereemployedtopreparethenanomaterialandnanomateriala

2、pplicationinpracticewerealsoinvestigated．Thecontentofthispaperwasconsistoffourparts嬲follows：1．AnovelapproachtopreparehomogeneousPbSnanomaterialbyphase-transfermethodwasdeveloped．Thepreparatoryconditionswerestudiedindetml，andthenanomaterialWascharacterizedbytransmissionelectronm

3、icroscopy(TEM)andUV．visspectroscopy．InordertoattainbetterPbSnanoparticles，theoptimalpHWaS6，andtheconcentrationofleadionwas1．Ox10qmol·L．1．TheoptimalconcentrationofH2DzincarbontetrachloridesolutionandCHsNSCH2inethylMcoholwere1．5x104mol·L‘1and1．0×10qmol。L-1，respectively．Theresults

4、showedthatleadsulfidenanomaterialpreparedinthisconditionhasuniformdistributionandcompactstructure．2．Leadion—selectiveelectrodeofpolyvinylchloride(PVC)membranebasedontheleadsulfidenanomaterialasprepared，andtheoptimalratioofcomponentsinthemembranewasdetermined．Theresultsindicated

5、thatthesensorexhibitedawideconcentrationrangeofl．0x10‘5to1．0x10～mol·L．I．TheresponsetimeoftheelectrodeWaSabout10S，andtheoptimalpHinwhichtheelectrodecouldbeusedWasfrom3．5to7．0．Selectivitycoefficientsindicatedthattheelectrodewasselectivetotheprimaryionovertheinterferingion．Theelec

6、trodecanbeusedforatleast3monthswithoutanydivergenceinpotential．ItWassuccessfullyappliedtodirectlydetermineleadionsinsolutionandused淞allindicatorelectrodeinpotentiometrictitrationofleadionswithEDTA．ItishopedthatthiskindofleadionselectiveelectrodeWasagoodprosperityforpracticalsam

7、ples．3．LeadsulfidenanomaterialWasalsousedtopreparesulfideion-selectiveelectrode．Theoptimalratioofcomponentsinthemembranewasinvestigated．Theresultsindicatedthatthesensorexhibitedawideconcentrationrangeof1．OxlO’7to1．0x10‘4t001．L-1．Theresponsetimeoftheelectrodewasabout24S，andtheop

8、timalpHofthetestsolutionWas11．0．Italsotestifiedthatthe