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ISSN : 1225-0562(Print)
ISSN : 2287-7258(Online)
Korean Journal of Materials Research Vol.23 No.2 pp.143-148
DOI : https://doi.org/10.3740/MRSK.2013.23.2.143

Synthesis of Well-Distributed SnO2-Sn-Ag3Sn Nanoparticles in Carbon Nanofibers Using Co-Electrospinning

An, Geon-Hyoung, Ahn, Hyo-Jin

Abstract

Well-distributed SnO2-Sn-Ag3Sn nanoparticles embedded in carbon nanofibers were fabricated using a co-electrospinning method, which is set up with two coaxial capillaries. Their formation mechanisms were successfully demonstrated. The structural, morphological, and chemical compositional properties were investigated by field-emission scanning electron spectroscopy (FESEM), bright-field transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). In particular, to obtain well-distributed SnO2 and Sn and Ag3Sn nanoparticles in carbon nanofibers, the relative molar ratios of the Ag precursor to the Sn precursor including 7 wt% polyacrylonitrile (PAN) were controlled at 0.1, 0.2, and 0.3. The FESEM, bright-field TEM, XRD, and XPS results show that the nanoparticles consisting of SnO2-Sn-Ag3Sn phases were in the range of ~4 nm-6 nm for sample A, ~5 nm-15 nm for sample B, ~9 nm-22 nm for sample C. In particular, for sample A, the nanoparticles were uniformly grown in the carbon nanofibers. Furthermore, when the amount of the Ag precursor and the Sn precursor was increased, the inorganic nanofibers consisting of the SnO2-Sn-Ag3Sn nanoparticles were formed due to the decreased amount of the carbon nanofibers. Thus, well-distributed nanoparticles embedded in the carbon nanofibers were successfully synthesized at the optimum molar ratio (0.1) of the Ag precursor to the Sn precursor after calcination of 800˚C.

이중 전기방사법을 이용하여 SnO2-Sn-Ag3Sn 나노 입자가 균일하게 내재된 탄소 나노섬유의 합성

안건형, 안효진

초록