铁包覆T-ZnOw复合粉体的制备及其性能研究.docx

铁包覆T-ZnOw复合粉体的制备及其性能研究
摘要：
本文以T-ZnOw复合粉体为研究对象，研究了不同条件下制备的铁包覆T-ZnOw复合粉体的结构、形貌和性能。结果表明，当铁粉的添加量为T-ZnOw质量的10%时，制备的铁包覆T-ZnOw复合粉体结构完整，表面覆盖铁层，具有较好的导电性和磁性能力。同时，铁层的存在还增强了复合粉体在可见光下的吸收能力，使其具备了作为光催化剂的潜力。
关键词：铁包覆T-ZnOw复合粉体；制备条件；结构形貌；性能
Introduction
T-ZnOwcompositepowdershaveattractedmuchattentionduetotheiroutstandingpropertiessuchashighconductivity,excellentmagneticproperties,andgreatpotentialforapplicationsinthefieldsofoptoelectronics,photoelectrochemistry,andcatalysis.However,theapplicationofT-ZnOwcompositepowdersisstilllimitedbytheirrelativelylowabsorptionofvisiblelight,whichrestrictstheiruseasphotocatalysts.Toovercomethisproblem,iron-coatedT-ZnOwcompositepowderswerepreparedinthisstudytoenhancetheirvisiblelightabsorptionabilityandimprovetheirphotocatalyticperformance.
MaterialsandMethods
T-ZnOwcompositepowdersweresynthesizedbyaco-precipitationmethodusingzincnitrateandsodiumhydroxideasprecursors.Iron-coatedT-ZnOwcompositepowderswerepreparedbyaddingacertainamountofironpowderduringtheco-precipitationprocess.TheobtainedpowderswerecharacterizedbyX-raydiffraction(XRD),scanningelectronmicroscope(SEM),energydispersivespectroscopy(EDS),andvibratingsamplemagnetometer(VSM).
ResultsandDiscussion
TheXRDpatternsoftheobtainedpowdersshowedthattheT-ZnOwcompositepowderswereofhexagonalwurtzitestructure,andtheironcoatingdidnotaffectthecrystalstructureofthecompositepowders.TheSEMimagesrevealedthattheT-ZnOwcompositepowdershadarod-likemorphology,whiletheiron-coatedT-ZnOwcompositepowdershadalayeredstructurewithaclearironcoatingonthesurface.TheEDSresultsshowedthattheironcontentinthecoatedpowdersincreasedwiththeamountofaddedironpowder.
TheVSMresultsshowedthattheiron-coatedT-ZnOwcompositepowdersexhibitedferromagneticbehavior,whichwasattributedtothepresenceofirononthesurface.Theelectricalconductivityoftheiron-coatedT-ZnOwcompositepowderswashigherthanthatoftheuncoatedpowders,indicatingtheexcellentelectricalpropertiesofthecompositepowders.Thevisiblelightabsorptionabilityoftheiron-coatedT-ZnOwcompositepowd