Functionalization of Mesoporous Silicas as Strategy for Obtaining Nanocomposites with Controlled Graphitic Domains Quantity and Carbon Content
We report in this work the use of a synthetic procedure to prepare silica-carbon composites with controlled carbon content and number of graphitic nanocarbon domains. This synthetic protocol was applied to prepare carbon nanostructures supported at two different amorphous silicas that
have similar disordered pore system structure but different specific surface areas and pore volumes. The carbon nanostructures were obtained by the silica surface grafting with different amounts of 2,3-dihydroxynaphthalene (DN) using a dehydration reaction followed by pyrolysis at temperatures
between 973 and 1173 K. We observed that the number of the graphitic nanodomains and the carbon loading at the pyrolysed samples could be tuned by the synthetic parameters during the functionalization and thermal treatment steps, as by the textural properties of the support.
Keywords: Composite Materials; Functionalization; Graphitic Domains; Nanostructures; Raman Spectroscopy
Document Type: Research Article
Affiliations: Laboratory of Functional Materials, Institute of Chemistry, University of Campinas (UNICAMP), Campinas, São Paulo, 13083-970, Brazil
Publication date: 01 April 2017
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