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.docVIP

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 【英文摘要】Magnetic alloys materials are very important functional materials, which have attracted extensive attention because of their special physical, chemical properties and their potential applications in ferrofluids, magnetic resonance imaging, biotechnology, biomedicine, data storage, catalytsis, and environmental remediation, etc., and which strongly depended on their size, morphology, composition, and structure etc. In this thesis, we focused on developing different methods to synthesize magnetic binary alloys micro-/nanostructures based on Fe, Co and Ni with different morphologies, sizes, and compositions. At the same time, their formation mechanism, magnetic properties, and catalytic applications in reduction of 4-Nitrophenol were studied. The main contents and major results are given as follows:1. Uniform-sized, monodisperse, and single crystalline 3-dimensional NiCo2 dendritic microstructures were successfully synthesized in high yield by a simple and facile solution phase route in presence of CTAB. By adjusting the experimental parameters NiCo alloys nanostructures with different morphologies, sizes, and compositions were controllable synthesized, at the same time, the formation mechanism was investigated. While NiCo2 alloys micro-structure with shapes of sphere-like and flower-like were prepared by hydrothermal and solvothermal methods, respectively. Magnetic measurements revealed that all of the NiCo2 alloys obtained are ferromagnetic at room temperature. The saturation magnetization value of the Ni33.8Co66.2 dendrites （163.55 emu/g） is lower than that of the Ni32.3Co67.7 spheres （212.29 emu/g） and Ni33.4Co66.6 flower-likes （195.79 emu/g）, but the Ni33.8Co66.2 dendritic structures exhibit an enhanced c