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Citation: ZHAO Chun-Rong, YANG Juan-Yu, LU Shi-Gang. Preparation of SiC Nanowires by Direct Electro-reduction of SiO2/C Pellets in Molten Salt[J]. Chinese Journal of Inorganic Chemistry, ;2013, 29(12): 2543-2548. doi: 10.3969/j.issn.1001-4861.2013.00.371 shu

Preparation of SiC Nanowires by Direct Electro-reduction of SiO2/C Pellets in Molten Salt

  • 1.

    General Research Institute for Nonferrous Metals, Beijing 100088, China

  • Received Date: 23 April 2013
    Available Online: 15 July 2013

    Fund Project: 国家863计划(No.2012AA110102)国家自然科学基金(No.51004016)资助项目。 (No.2012AA110102)国家自然科学基金(No.51004016)

  • Silicon carbide nanowires were synthesized by mixing formaldehyde resin carbon and nanometer silicon dioxide (atomic Si/C ratio, 1∶1) under cell voltage of 2.0 V in molten CaCl2 at 900 ℃. The morphology, structure and chemical composition of the samples prepared by electro-reduction method were characterized by field-emission scanning electron microscopy (FE-SEM), transmission electronic microscope (TEM), High-resolution transmission electron microscopy (HRTEM) coupled with electron energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and laser Raman spectroscopy. The results reveal that silicon carbide nanowires are crystalline with a cube structure, the diameter is distributed from 4 nm to 13 nm and the length is generally several micrometers. Two broad photoluminescence (PL) peaks at the center wavelength of about 415 nm and 534 nm were observed at room temperature. The formation mechanism of the SiC nanowires is also discussed.
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