کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5367008 | 1388359 | 2011 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Pre-hydrolysed ethyl silicate as an alternative precursor for SiO2-coated carbon nanofibers Pre-hydrolysed ethyl silicate as an alternative precursor for SiO2-coated carbon nanofibers](/preview/png/5367008.png)
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. 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.
⺠SiO2-coated CNFs were obtained using two sol-gel precursors. ⺠TEOS and pre-hydrolysed ethylsilicate can coat the CNF effectively. ⺠Pre-hydrolysed has faster gelation times and higher surface than TEOS. ⺠The use of pre-hydrolysed can be considered an alternative to TEOS.
Journal: Applied Surface Science - Volume 258, Issue 3, 15 November 2011, Pages 1212-1216