可磁分離的TiO2基光催化納米纖維的制備研究.pdf

1、北京服裝學(xué)院碩士學(xué)位論文可磁分離的TiO2基光催化納米纖維的制備研究姓名：張蓮蓮申請學(xué)位級別：碩士專業(yè)：材料學(xué)指導(dǎo)教師：李從舉201112ThePreparationandResearchofMagneticallySeparableTie2PhotocatalystNanofibersAbstractSrlxLaxFenxCoxOl9(x=O、O5)ferritenanofibersweresuccessfullyabtainedby

2、electrospinningtechniqueThesamples，morphologyphases，structureandmagneticpropertiesofthenanofiberswerecharacterizedbyScanningdeepenmicroscopy(SEM)，Transmissionelectronmicroscope(TEM)，Xraydiffraction(XRD)andVibratingsample

3、magnetometerfVSM)Theresultsshowthatthesampleshaveanuniformdiameterof80150nnlafterbeingcalcinedat800oCThesubstitutionofLa3andcdobviouslyincreasesthemagneticpropertiesoftheaspreparedsamplesatx卯1，Ⅱlecoercivity(Hc)andrernane

4、ntmagnetization(M)ofSro9LaoiFen9Coot019nanofierscorrespondinglyare43202kA／m，289A‘m2／kgwhichweremuchenhancedcomparedtotheSro9LaoiFell9CootOi9powdersampleTi02／Mn203nanofiberswereabtainedbyelectrospinningmethodsTheTi02／Mn20

5、3nanofiberswerecharacterizedbySEM，TGDTA，XRDandUV二ⅥsspectrophotometerTheresultsshowedthatitcarlbeproducedintoTi02／Mn203nanofiberswithasmalldiameterof100nnlaftercalcinationat500oCTheincorporationofMn203intotitaniadioxideCa

6、nsignificantlyextendtheabsorptionbythephotocatalystsintovisiblerangeOnthebaseofaboveresearch，magneticallyseparablephotocatalysismaterials，L暑13Ti02／CoFe204nanofibersandTi02／SrFel2019nanospheros，wereobtainedbymeansofanovel

7、twospinneretelectrospinningtechniqueandsolgelmethodThephotocatalysismaterialswerecharacterizedbyXRD、SEM、TEMandVSMrespectivelyTheresultsshowthat，the／CoFe204nanofibershaveanefficientphotocatalyticpropertyandthedegradationr

8、ateofMBcouldreach93％in25hMoreover，thenanofibersshowagoodmagneticresponseTheaveragediameteroftheTi02／SrFel2019nanospheresis300700nnlaftercalcinationandthephotodegradationratioofMBbyTi02／SrFel20t9nanospheresisupto93％underi