Articles
  • Morphology control of Nb-doped SnO2 nanofibres formed via electrospinning: From hollow nanofibres to dense nanofibres
  • Ha-Rim An and Hyo-Jin Ahna,*
  • Department of Materials Science & Engineering, Seoul National University of Science and Technology, Seoul 139-743, Korea
Abstract
Nb-doped SnO2 nanofibres (NFs) with controlled morphologies were fabricated using an electrospinning method. In particular, structures ranging from hollow to dense were formed depending on the heating rate. To achieve this morphology control, relative mole ratios of the Nb precursor to the Sn precursor of 0.007, 0.021, and 0.035 were used, and the heating rate was 0.416, 0.625, 1.25, and 5 oC/min. The structural, compositional, and morphological properties of the obtained NFs were evaluated by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (FE-SEM), and transmission electron microscopy (TEM). The succesful formation of hollow and dense Nb-doped SnO2 NFs was found to be directly related to the use of a fast heating rate (5 oC/min) and a slow heating rate (0.416 oC/min), respectively. This relationship can be explained in terms of the diffusion of the ions decomposed from poly(vinypyrrolidone).

Keywords: Electrospinning, Nb-doped SnO2, Nanofibre, Hollow and dense structures.

This Article

  • 2013; 14(3): 371-375

    Published on Jun 30, 2013

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