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静电纺碳纳米纤维负载SnS_2纳米粒子的可控制备及性质研究
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摘要
纳米纤维在光、热、磁、电等方面表现出许多优良的性能,因此引起了科研工作者的广泛关注。其中,表面修饰金属硫化物的碳复合纳米纤维因其卓越的比容量以及良好的循环稳定性,在能源存储和转换领域有着广泛的应用。另外,由于碳与硫化物之间的协同作用,表面修饰金属硫化物的碳复合纳米纤维还有望在催化以及纳电子器件等领域有重要应用。我们将静电纺丝技术与高温煅烧技术相结合,制备了碳纳米纤维,进而使用一步溶剂热方法将SnS_2纳米粒子均匀地修饰在碳纳米纤维的表面,得到碳纤维负载SnS_2纳米粒子的纳米复合材料。通过SEM,TEM,XRD,XPS等测试方法对纤维形貌及组成进行表征。此外,我们研究了反应温度、时间、以及反应物分子比等条件在合成过程中对生成的SnS_2颗粒尺寸及分布的影响。
Fibrous nanomaterials have attracted more and more attention for researchers due to their unique properties in optics, thermotics, magneticsand electrics. Recently, carbon nanofiber(CNFs) modified with metal sulfide has showed broad applications in the field of energy storage and conversion due to their excellent rate capacitance and good cycle stability. In addition, CNFs modified with metal sulfide can also be used in catalysis and electronic devices. In this work, we have prepared CNFs through an electrospinning technique with a calcination process, and then modified with the SnS_2 nanoparticles on their surface via a one-pot solvothermal approach to produce SnS_2/CNFs nanocomposites. The morphology and chemical structure of the SnS_2/CNFs nanocomposite swere characterized by SEM,TEM,XRD,XPS measurements. In addition, we have investigated the effects of reaction temperature, reaction time and the molar ratio of the reactants on the particle size and distribution of the generated SnS_2 nanoparticles during the synthetic process.
引文
[1]Greiner,A.;Wendorff,J,H.Angew.Chem.Int.Ed.2007,46:5670.
    [2]Zhai,C.;Du,N.;Zhang,H.;Yu,J.;Yang,D.ACS Appl..Mater.interfaces.2011,3:4067.

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