不同掺杂聚苯胺膜对乙醇气体的吸附性能

Vol.35No.42009-08()JournalofEastChinaUniversityofScienceandTechnology(NaturalScienceEdition):2008-06-26:/0(2006BAK20B00,2006BAK20B01);(yb0157107):(1983-),,,,:E-mail:[e-mail]:,E-mail:[e-mail]:1006-3080(2009)04-0569-04彭熙瑜1,闫莹1,周浩2,吴来明2,赵利红1,蔡兰坤1(1.华东理工大学资源与环境工程学院,上海200237;2.上海博物馆文物保护与考古科学实验室,上海200233):采用恒电流法制备不同掺杂的聚苯胺膜,通过循环伏安法对不同掺杂聚苯胺膜的吸附性能进行了研究,并采用扫描电子显微镜分析了不同掺杂聚苯胺膜的表面形貌特征结果表明:3种不同掺杂的聚苯胺膜(PAn)对乙醇分子都有吸附性能,其中质子酸掺杂的PAn和纳米ZnO掺杂的PAn对乙醇分子的吸附性能较好,而KCl掺杂的PAn吸附性能相对较差,其吸附性能与掺杂前后聚苯胺膜的结构有关:聚苯胺;掺杂;循环伏安法;扫描电子显微镜(SEM):O633.21:AAdsorptionCapabilitiesOfEthanolGasontheDifferentDopedPolyanilineFilmsPENGXi-yu1,YANYing1,ZHOUHao2,WULai-ming2,ZHAOLi-hong1,CAILan-kun1(1.SchoolofRecoursesandEnvironmentalEngineering,EastChinaUniversityofScienceandTechnology,Shanghai200237,China;2.LaboratoryofRelicsProtectionandArchaeologicalScienceofShanghaiMuseum,Shanghai200233,China)Abstract:Differentdopedpolyanilinefilmswerepreparedbygalvanostaticmethodatlowcurrentden-sity.Theadsorptionpropertiesofdifferentdopedpolyanilinefilmswerestudiedusingcyclicvoltammetry,andthesurfacemorphologywasanalyzedusingscanelectronmicroscopy.Theresultsindicatethatthreedifferentdopedpolyanilinefilms(PAn)havedifferentadsorptionpropertiestoethanolmolecules.Com-paredwithKCl/PAn,PAnandZnO/PAnhavebetteradsorptioncapabilities.Theadsorptionpropertiesarerelativewiththestructureofthepolyanilinefilms.Keywords:polyaniline;doping;cyclicvoltammetry;scanelectronmicroscope(SEM)(PAn),,[1],[2-3][4][5-10][11-12][13-14],569,[9],,,,11.1SolartronS11280B()ZF-9/()2132321.21.2.1聚苯胺膜(PAn)电极的制备[15],,Pt,1mol/L2mol/LHCl,N2O2,[16](42LA/cm2),,NaOH,,N2,1.2.2ZnO/PAn复合物膜的制备[17-18]ZnO:1.10g(5mmol)Zn(Ac)2#2H2O50mL,0e,a()0.29g(7mmol)LiOH#H2O50mL,0eb0eba,0.1gLiOH#H2O,,ZnOAgZnO10min,150e5min,5,0.8LmZnO1.2.3KCl掺杂的聚苯胺膜电极的制备KClPAnPAn,0.05mol/LKCl1mol/L2mol/LHCl,42LA/cm21.3(1.0cm2),,(SCE),,0.5mol/L,,SCE100mV/s,-0.2~0.9V,PAn,,30min,,22.1ZnO/PAnKCl/PAn11Fig.1Cyclicvoltammogramas(CVs)ofdifferentmodifiedelectrodeswithadsorbedethanolornotinthesulfu-ricacidsolution1a570()351,21,,[19-20],,:2,,,,$EP[21],12,,,,1bZnO1cKCl,,,,,,,ZnO,,,1,PAnZnO/PAnKCl/PAn,,11Table1CVpeakvaluesofpolyanilineanditsshiftsBeforeadsorbedEpa/VEpc/VIpa/mAIpc/mAAfteradsorbedEpa/VEpc/VIpa/mAIpc/mAChangesvEpa/VvIpa/mAvEpc/VvIpc/mAPan0.5490.3720.070-0.1080.5330.3710.202-0.344-0.0160.132-0.001-0.236ZnO/Pan0.5660.3120.445-0.5930.5100.4080.550-0.845-0.0560.1050.096-0.252KCl/Pan0.5660.3280.043-0.0560.5750.3070.059-0.0740.0090.016-0.021-0.018Epa-Oxidatedpeakpotential;Epc-Reductivepeakpotential;Ipa-Oxidatedpeakcurrent,Ipc-Reductivepeakcurrent1,,;,vEp=|Epa-Epc|=0.177V,vEp=|Epa-Epc|=0.162V,,,ZnOPAn,,;,vEp=|Epa-Epc|=0.244VZnOPAn,,vEp=|Epa-Epc|=0.102V,,vEp,Zn0,KClPAn,,;,vEp=|Epa-Epc|=0.238V,,,vEp=0.268V,,KCl,,CV1,,PAnZnO/PAn,KCl/PAn,2.2(SEM)PAnZnO/PAnKCl/PAn,25714,:(a)PAn(b)ZnO/PAn(c)KCl/PAn2SEMFig.2SEMfigureofthepolyanilineanditscompoundfilms2aPAn,,,,,2bZnO/PAn,ZnO/PAn,ZnO,ZnO,,[22],,2cKCl/PAn,,KCl,KCl/PAn,,,3PAn,,PAnZnO/PAn,KCl/PAn,PAn:[1]YongC,SmithP,HeegerAJ.Counterioninducedprocess-ibilityofconductingpolyaniline[J].SynthMet,1993,57:3514-3519.[2]LuWeikang,ElsenbaumerRL,WesslingB.Crossionprotec-tionofmildsteelbycoatingscontaininpolyaniline[J].SynthMet,1995,71(1-3):2163-2166.[3]TaloA,PassiniemiP,ForsenO.etal.Polyaniline/epoxycoatingswithgoodant-icorrosionproperties[J].SynthMet,1997,85(1-3):1333-1334.[4],,,.[J].,1999,12(3):350-356.[5],,,./[J].,2004,14(8):33-36.[6],,.[J].,2000,28(9):16-19.[7],,,.[J].,2006,4(4):25-28.[8].PtpH[J].:,2002,25(1):35-37.[9]WuXiaqin,YujiTakao,MakotoEgashira.[J].,1997,13(3):330-333.[10],./0)))QCM[D].:,2003.[11],,,.[J].,2008,41(1):1-4.[12],,,.[J].,2005,33(12):5-8.[13],,,.[J].,2004,20(5):29-32.[14],,,.[J].,2006,21(6):1-6.[15],,.[J].,1994,13(3):16-19.[16],,.[J].,1994,15(3):348-351.[17]HeYongjun.Preparationofpolyaniline/nano-ZnOcompositesviaanovelpickeringemulsionroute[J].PowderTechnology,2004,14(7):59-63.[18].ZnO/PANI[J].,2006,26(4):50-53.[19],,,./[J].,2002,23(3):496-499.[20],,.[J].,1994,15(8):1140-1145.[21],,,.[J].,2007(4):68-69.[22],,,.ZnO/[J].,2003,2(1):91-94.572()35