Abstract
Nanostructured silica (n-SiO2) synthesized by sol-gel method was used in this work as a support for multi-walled carbon nanotubes (MWCNTs) synthesis by catalytic chemical vapor deposition (CCVD) process. The syntheses were performed using methane as carbon feedstock and without previous catalyst reduction with hydrogen. Three different methods to incorporate the iron-based catalyst on the silica support have been studied to identify its influence on the structural characteristics of the synthesized MWCNTs. Such study aims to develop the production of an advanced hybrid composite with better structural properties to be applied as a strengthener additive in different material matrices. The synthesized hybrid composites were characterized to analyze the MWCNTs quality in terms of morphology, graphitization degree, and thermal stability. Regarding the silica support containing the catalyst, Infrared (FTIR) and X-ray (XRD) analyses showed that no significant differences in terms of chemical composition and crystalline phases have been observed between the analyzed samples regardless of the catalyst incorporation method used. Concerning the hybrid composite, Raman spectroscopy, electron microscopies, and thermal analyses suggested modifications in terms of graphitization degree, morphology, and thermal stability of the MWCNTs. Indeed, the catalyst incorporation method would influence the catalyst/support interaction promoting the deposition of different carbon structures, and the quality of the MWCNTs grown in the hybrid material.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.