开放体系下铜基纳米结构的溶液法制备及应用研究

发布时间：2018-05-25 01:46

本文选题：液相合成 + 铜　；参考：《湖南大学》2010年硕士论文

【摘要】： 纳米材料以其独特的性能和效用,为高新技术产业的发展开辟了一个全新的技术领域,在未来的科技发展中有很大的发展潜力,纳米金属材料的研究不可忽视。铜作为应用广泛的金属材料,在纳米领域的研究中,以其独特的性质,低廉的价格,受到国内外大量学者的关注。本文采用溶液中的还原技术,从各种不同前躯体CuO、[Cu(NH3)4]2+、Cu2(OH)2SO4、Cu(OH)2制备铜、铜基复合物入手,系统地研究了其制备过程中的影响条件及合成机理,并且结合XRD、TEM、SEM、UV-vis等现代物理手段,对产物的成分,形貌及结构进行了分析表征。前驱体为CuO时的样品经XRD表征分析Cu/Cu2O复合物,SEM表征分析,其为规则八面体纳米笼结构,尺寸均一,在200nm左右。考察了不同反应因素对于八面体纳米笼形成的影响。经过UV-vis分析结果表明,产物在500nm和600nm左右有吸收峰,说明产物有光学活性。产物的分散性好,经过应用性实验表明,该产物对有机染料罗丹明B有一定的降解作用。在氨水参与的反应中,以前躯体[Cu(NH3)4]2+、Cu2(OH)2SO4制备得出的产物,经过SEM表征,其形貌为无规则纳米粒子,尺寸在200～500nm之间,说明不同前躯体对产物的形貌有较大的影响。在室温下,采用不同反应方式制备铜纳米粒子。单滴法样品经XRD表征分析,产物纯度极高,经SEM表征分析,其形貌接近球形,尺寸在200～500nm之间而双滴法制备的产物为不规则形貌,且不同滴加方式制备出产物的纯度亦有所不同。由此说明不同的反应方式对于产物的制备有很大影响,包括产物的纯度和形貌。
[Abstract]:Nanomaterials, with their unique properties and utility, have opened up a new technical field for the development of high-tech industry, and have great potential in the future development of science and technology. The research of nanomaterials can not be ignored. As a widely used metal material, copper has attracted much attention from many scholars at home and abroad for its unique properties and low price. In this paper, copper and copper based complexes were prepared from various kinds of precursor CuO, [Cu(NH3)4] 2 Cu2OHH4SO4 and CuOH2 by solution reduction technique. The influence conditions and synthesis mechanism of CuO were systematically studied, and modern physical methods such as XRDX TEMSEMvis UV-vis were used. The composition, morphology and structure of the product were analyzed and characterized. The sample with CuO precursor was characterized by XRD and Cu/Cu2O complex. It is a regular octahedron nanocapron structure with uniform size about 200nm. The influence of different reaction factors on the formation of octahedron nanocolages was investigated. The results of UV-vis analysis show that the products have absorption peaks around 500nm and 600nm, indicating that the products have optical activity. The dispersity of the product was good. The application experiments showed that the product could degrade the organic dye Rhodamine B. In the reaction of ammonia water, the product prepared by the former body [Cu(NH3)4] 2 (Cu2OOHf2SO4) was characterized by SEM. The morphology of the product was irregular and the size was between 200~500nm, which indicated that different precursor had great influence on the morphology of the product. Copper nanoparticles were prepared by different reaction methods at room temperature. The single drop method was characterized by XRD and the purity of the product was very high. The morphology of the product was close to spherical by SEM characterization, the size of the product was irregular between 200~500nm and the product prepared by double drop method, and the purity of the product prepared by different dropping method was also different. It is concluded that different reaction modes have great influence on the preparation of the product, including the purity and morphology of the product.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2010
【分类号】：TB383.1

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