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《铁钴镍基二元合金论文：铁钴镍基二元合金微纳米结构的控制合成、磁学及催化性能》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、铁钴镍基二元合金论文：铁钴镍基二元合金微纳米结构的控制合成、磁学及催化性能【中文摘要】磁性合金材料作为一类重要的功能材料,引起了科学家的广泛关注,并在很多领域得到广泛的应用,如:磁流体、催化、生物科技和生物医药、磁共振成像、数据存储、环境治理等领域。而纳米材料的性能常常受其尺寸、形貌和组成的影响,因此,可控制合成磁性微纳米材料与性能研究成为了化学和材料学研究的重要领域之一。本论文旨在发展不同的合成方法制备具有不同形貌、尺寸和组成的铁钴镍基二元合金微纳米材料,同时,对其形成机理、相关磁学性能和在对硝基苯酚【
2、英文摘要】Magneticalloysmaterialsareveryimportantfunctionalmaterials,whichhaveattractedextensiveattentionbecauseoftheirspecialphysical,chemicalpropertiesandtheirpotentialapplicationsinferrofluids,magneticresonanceimaging,biotechnology,biomedicine,datastorage,c
3、atalytsis,andenvironmentalremediation,etc.,andwhichstronglydependedontheirsize,morphology,composition,andstructureetc.Inthisthesis,wefocusedondevelopingdifferentmethodstosynthesizemagneticbinaryalloysmicro-/nanostructuresbasedonFe,CoandNiwithdifferentmorp
4、hologies,sizes,andcompositions.Atthesametime,theirformationmechanism,magneticproperties,andcatalyticapplicationsinreductionof4-Nitrophenolwerestudied.Themaincontentsandmajorresultsaregivenasfollows:1.Uniform-sized,monodisperse,andsinglecrystalline3-dimens
5、ionalNiCo2dendriticmicrostructuresweresuccessfullysynthesizedinhighyieldbyasimpleandfacilesolutionphaserouteinpresenceofCTAB.ByadjustingtheexperimentalparametersNiCoalloysnanostructureswithdifferentmorphologies,sizes,andcompositionswerecontrollablesynthes
6、ized,atthesametime,theformationmechanismwasinvestigated.WhileNiCo2alloysmicro-structurewithshapesofsphere-likeandflower-likewerepreparedbyhydrothermalandsolvothermalmethods,respectively.MagneticmeasurementsrevealedthatalloftheNiCo2alloysobtainedareferroma
7、gneticatroomtemperature.ThesaturationmagnetizationvalueoftheNi33.8Co66.2dendrites（163.55emu/g）islowerthanthatoftheNi32.3Co67.7spheres（212.29emu/g）andNi33.4Co66.6flower-likes（195.79emu/g）,buttheNi33.8Co66.2dendriticstructuresexhibitanenhancedcoercivityvalu
8、e.NiCo2alloyswithdifferentshapes(Ni33.8Co66.2dendrites,Ni33.4Co66.6flower-likesandNi32.3Co67.7spheres)havebeenusedasreusableheterogeneouscatalyststoreduce4-nitrophenol（4-NP）into4-aminophenol（4-AP）byNaBH4.Fromtheaver
