2114物理化学学报(WuliHuaxueXuebao)ActaPhys.-Chim.Sin.,2008,24(11):2114-2121November[Article]www.whxb.pku.edu.cn改性PAN纤维与铁离子的配位结构及其对染料降解的催化作用董永春2,*杜芳】韩振邦IC天津工业大学纺织学院纺织化学与生态学研究中心,天津300160;2福州大学光催化国家重点实验室培育基地，福州350002)摘要：在室温条件下应用偕胺肪改性聚丙烯膳纤维(AO-PAN)与FeCb反应制备了聚丙烯纤维铁配合物(FeAO-PAN),并分别使用X射线光电子能谱(XPS)、傅立叶红外光谱(FTIR)、动态热机械分析(DTMA)和电导法对Fe-AO-PAN进行了表征以确定其组成结构•然后将Fe-AO-PAN作为非均相Fenton催化剂应用于两种常用偶氮染料C.I.活性红195(RR195)和C.I.酸性黑234(AB234)的光催化氧化降解反应中,考察了其对降解反应的催化作用•结果表明,Fe-AO-PAN中的F申能够与AO-PAN表面三个偕胺肪(A0)链节单元的三个氨基氮原子和三个轻基氧原子进行配位反应,配位数为6.在Fe-AO-PAN和辐射光存在下，两种染料的氧化降解反应速度显著加快，染料结构中的偶氮键和芳香环结构都遭到破坏.PAN纤维睛基转化率的提高不仅能够明显增加Fe-AO-PAN表面结构中Fe»含量，而且可显著促进其对染料氧化降解反应的催化作用.关键词:高分子-金属配合物;配位结构;改性PAN纤维;铁离子;催化;偶氮染料;降解中图分类号：0643CoordinationStructurebetweenModifiedPANFiberandFe(lll)IonandItsCatalyticFunctiononDegradationofAzoDyesDONGYong-Chun1,2r*DUFang1HANZhen-Bang1『DivisionofTextileChemistry&Ecology,SchoolofTextiles,TianjinPolytechnicUniversity,Tianjin300160,P.R.China;'StateKeyLaboratoryBreedingBaseofPhotocatalysis,FuzhouUniversity,Fuzhou350002,P.R.China)Abstract:Thecoordinationprocessandstructurebetweenamidoximemodifiedpolyacrylonitrile(AO-PAN)fiberandFeCI3inaqueoussolutionwerestudiedbyusingX-rayphotoelectronspectroscopy(XPS),Fouriertransforminfraredspectrometer(FTIR),dynamicthermalmechanicalanalyzer(DTMA),andelectricalconductivitymethod,respectively.ThecoordinationFe-AO・PANfiberwasobtained*andthenusedasaheterogeneousFentoncatalystfortheoxidativedegradationoftwoazodyesincludingC.l.ReactiveRed195(RR195)andC.l.AcidBlack234(AB234)inthepresenceofH2O2.ThecatalyticfunctionofFe-AO・PANondyedegradationwasinvestigatedwithrespecttodecolorationpercentageinthiswork・TheresultsindicatedthattheFe34ionofFe-AO・PANwascoordinatedwiththreeaminonitrogenatomsandthreehydroxyloxygenatomsofthreeamidoximeunitsonthesurfaceofAO-PANbycovalentbond,andthecoordinationnumberwassix.Moreover,theoxidativedegradationoftwoazodyesinwaterwassignificantlyacceleratedinthepreseneeofFe-AO-PANunderlightirradiation,andtheazolinkagesandaromaticringofazodyemoleculesweredecomposed.IncreasingthedegreeofconversionfromnitrilegrouptoamidoximegrouponthesurfaceofPANfibercausednotonlyhigherFe3*contentofFe-AO-PAN,butalsoitsstrongercatalyticperformanceondyedegradationinaqueoussolution・Keywords:Polymer-metalcomplex;Coordinationstructure;ModifiedPANfiber;Ferricion;Catalysis;Azodye;DegradationReceived:April28,2008;Revised:July1,2008;PublishedonWeb:September15,2008.Correspondingauthor.Email:dye@tjpu.edu.cn;Tel:+8622-24528430.国家自然科学基金(20773093)及教育部高等学校博士点专项基金(20070058005)资助项目鬍EditorialofficeofActaPhysico-ChimicaSinica多年来，均相Fenton技术以其反应简单和物料廉价在染料废水处理中备受关注，然而其缺点主要表现为反应体系的pH值必须控制在2-4之间,而且作为均相催化剂的F3+难以与反应介质分离而引起二次污染⑴.因此近年来非均相Fenton技术已成为研究热点，不仅可以在较广泛的pH范围得以应用，而且易于循环利用.在非均相Fenton催化剂的研究中，将Fe头固定于有机负载材料，如Nafion膜g、离...