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

Autor(es)

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

• Tipo de documento: Artigo Científico
• Fonte: Journal of Nanoscience and Nanotechnology; v. 17, n. 4, p. 2804-2810, APR 2017.
• Citações Web of Science: 1

Resumo

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)

• Processo FAPESP: 12/20511-7 - Sistemas químicos integrados baseados em nanoestruturas de carbono suportadas em matrizes porosas: Correlações entre o protocolo de síntese, propriedades físico-químicas e aplicação em cromatografia e eletroquímica.
• Beneficiário: Mathias Strauss
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 13/24400-8 - Sílicas mesoporosas híbridas como plataformas para a obtenção controlada de nanopartículas metálicas: relação entre a nanoestruturação e a atividade catalítica.
• Beneficiário: João Paulo Vita Damasceno
• Linha de fomento: Bolsas no Brasil - Mestrado