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1、光催化论文：TiO_2/石墨烯磁性复合材料的制备及性能研究【中文摘要】光催化剂可以利用光能降解环境污染物,不仅起到了环境治理的作用,还可以节约能源。其中TiO2作为一种传统的光催化材料,因其价廉、无毒、化学性质稳定等优点,受到广大研究者的青睐。纯相的TiO2只能吸收紫外光,不能利用可见光进行光催化降解,使其应用受到限制。研究者们对其进行了改性研究,并取得了一定的成果,但还需要进一步的完善,使其不仅性能优异,而且更具有实际应用价值。石墨烯材料,为二维的晶体材料,具有很多独特的性质,利用其比表面积大、优良的导电性等特点,与T
2、iO2复合在一起,有望显著提高光催化剂的催化活性。因此,通过改进的Hummers法,制备出了氧化石墨烯材料,加入到TiO2前驱体中,通过水解反应,制得TiO2与氧化石墨烯的复合材料,再经过【英文摘要】Photocatalystcanuselighttodegradetheenvironmentalpollutants,notonlyplaytheroleofenvironmentalgovernance,butalsocansaveenergy.AmongthemthetraditionalTiO2photocataly
3、sismaterial,becauseofitslowprice,non-toxic,thechemicalstability,itdeservetheresearchers’sfavor.PureTiO2canonlyabsorbultravioletlight,andcannotusevisiblelight,whichmakeitsapplicationofcatalyticdegradationisrestricted.Researchersstudythemodificationmethods,andhaveo
4、btainedsomeachievements,buttherealsoneedtofurtherperfect,tomakeitnotonlytheoutstandingperformance,butalsomorepracticalapplicationvalue.Grapheneistwo-dimensionalcrystalmaterial,ithasmanyuniqueproperties.Withitshighspecificsurfaceareaandgoodconductive,TiO2combinesw
5、ithgraphene,itisexpectedtosignificantlyimprovetheactivityofphotocatalyst.Therefore,bytheimprovedHummersmethod,thegrapheneoxidewasprepared,andjoineditintoTiO2precursor,throughhydrolysisreaction,TiO2combinedwithgraphemeoxide,andthenafterreductionreaction,TiO2andgra
6、phenecombinationmaterialsweregot.TheTiO2powderhasrelativelyhighphotocatalysisactivity,buttherecyclingisdifficulty,CoFe2O4magneticparticleswerepreparedbytheprecipitatedmethod,andcombinedwithTiO2bysol-gelmethod.Usingitspropertyofmagnetism,theecycleofphotocatalystis
7、moreefficientandconvenient.Inordertopreparethecatalystwithhighphotocatalyticactivityandeasilyrecycled.CoFe2O4,grapheneandTiO2compoundtogetherbyhydrolysismethod,whichisanewphotocatalystwithbetterperformance.Allsortsofcompositematerialswerecharacterizedbytheinfrare
8、dspectrum,X-raydiffraction,uv-visdiffusereflectancespectroscopy,X-rayphotoelectronspectroscopy,scanningelectronmicroscope,etc.Thecrystalstyle,bondingonsurfacea
