Pre-hydrolysed Ethyl silicate (cas 11099-06-2) as an alternative precursor for SiO2-coated carbon nanofibers
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Add time:07/18/2019 Source:sciencedirect.com
This work reported basically aims at understanding the extent of SiO2-coated carbon nanofibers using two different sol–gel precursors for the silicate glass. The silicate precursors employed were tetraethoxysilane (TEOS) and pre-hydrolysed Ethyl silicate (cas 11099-06-2). The first route consisted in an acid hydrolysis and polycondensation of the TEOS and the second one in a polycondensation of the pre-hydrolysed ethyl silicate. The techniques of Fourier Infra Red spectroscopy, thermogravimetric analysis, scanning electron microscopy and X-ray diffraction were used to characterize the materials obtained. Both kinds of SiO2 precursor can coat the CNF effectively. However, the use of pre-hydrolysed ethyl silicate (faster gelation times and higher surface areas) can be considered a low-cost and facile alternative with respect to the use of TEOS, to obtain industrially silica-coated carbon nanofibers.
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