Functionalization of Mesoporous Silicas as Strategy for Obtaining Nanocomposites with Controlled Graphitic Domains Quantity and Carbon Content

Author(s)

Strauss, Mathias ; Vita Damasceno, Joao Paulo ; Sigoli, Fernando Aparecido ; Mazali, Italo Odone

• Document type: Journal article
• Source: Journal of Nanoscience and Nanotechnology; v. 17, n. 4, p. 2804-2810, APR 2017.
• Web of Science Citations: 1

Abstract

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. (AU)

• FAPESP's process: 12/20511-7 - Integrated chemical systems based on carbon nanostructures supported in porous matrices: Correlations between the synthesis protocol, physicochemical properties and application in chromatography and electrochemistry.
• Grantee: Mathias Strauss
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 13/24400-8 - Hybrid mesoporous sílicas as platforms for the controlled synthesis of the metallic nanoparticle: relation between the nanostructuring and the catalytic activity
• Grantee: João Paulo Vita Damasceno
• Support Opportunities: Scholarships in Brazil - Master