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1、Availableonlineatwww.sciencedirect.comMicroporousandMesoporousMaterials113(2008)393–401www.elsevier.com/locate/micromesoSynthesis,characterizationofbimetallicCe–Fe-SBA-15anditscatalyticperformanceinthephenolhydroxylationaaabbaYanhuaZhang,FeiGao,HaiqinWan,ChengWu,Ya
2、nKong,XingcaiWu,aa,*aBinZhao,LinDong,YiChenaKeyLaboratoryofMesoscopicChemistryofMOE,SchoolofChemistryandChemicalEngineering,NanjingUniversity,Nanjing210093,PRChinabKeyLaboratoryofMaterial-OrientedChemicalEngineeringofJiangsuProvinceandMOE,NanjingUniversityofTechnol
3、ogy,Nanjing210009,PRChinaReceived24March2007;receivedinrevisedform28November2007;accepted28November2007Availableonline14April2008AbstractAseriesofCeandFeincorporatedSBA-15mesoporousmaterialsweresynthesizedthroughdirecthydrothermalmethodandchar-acterizedbyusinginduc
4、tivelycouplingplasmaatomicemissionspectrometry(ICP-AES),powderX-raydiffraction(XRD),thermogra-vimetryanddifferentialscanningcalorimetry(TG/DSC),transmissionelectronmicroscopy(TEM),Fourier-transforminfraredspectroscopy(FT-IR),ultraviolet–visiblediffusereflectancespectra
5、(UV–vis)andN2adsorption–desorptionisothermtechniques.Theresultsindicatedthat:(1)allthesamplesexhibitedtypicalhexagonalarrangementofmesoporousstructurewithhighsurfacearea,(2)theheteroatomswere,atleastinsomeextent,incorporatedintotheframeworkofSBA-15,(3)highutilizati
6、onoftheFeandCecouldbeachievedthroughthehydrothermaltreatment,and(4)theincorporationofFecouldefficientlypromotetheincorporation/dispersionbehaviorofCeintotheSBA-15.CatalyticperformancesoftheobtainedmaterialswereevaluatedinthehydroxylationofphenolwithH2O2.Catalytictest
7、sshowedthedifferentselectivitywithdifferentincorporatedCe/Feratios,andtheresultssuggestthatanappropriateCe/Feratiowouldbetheoptimalcatalystforthereaction.Ó2007ElsevierInc.Allrightsreserved.Keywords:Bimetalincorporation;SBA-15;Synthesis;Characterization;Phenolhydroxyl
8、ation1.Introductionincorporationofheteroatomsintotheframeworkofmeso-porousmaterialscouldcreateactivesitesandnearlyallDuringthepastdecades,alargea
