Synthesis and characterization of nitrogen-doped carbon xerogels

• Tipo: Artigo em Revista Científica Internacional
• Data: 2009

Autores

Gorgulho, HF (Autor) Outra; Goncalves, F (Autor) Outra; Manuel Fernando R Pereira (Autor) FEUP; José Luis Figueiredo (Autor) FEUP

Revista

Título: Carbon

Vol. 47

Páginas: 2032-2039

ISSN: 0008-6223

Editora: Elsevier

Indexação

ISI Web of Knowledge - 90 Citações

ISI Web of Science

Scopus - 100 Citações

COMPENDEX

INSPEC

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Outras ciências da engenharia e tecnologias

CORDIS: Ciências Tecnológicas

Outras Informações

ID Authenticus: P-003-HNG

DOI: 10.1016/j.carbon.2009.03.050

Abstract (EN): Carbon xerogels were prepared from a nitrogen-containing polymer precursor, using melamine and urea as nitrogen sources incorporated into the polymer matrix using the sol-gel process. To investigate the effects of nitrogen on the texture, morphology and surface chemistry, the carbon xerogels were characterized by nitrogen adsorption, scanning electron microscopy, X-ray photoelectron spectroscopy (XPS), and acid-base titrations. The results showed that nitrogen was incorporated onto the surface as pyridine, pyrrolic/pyridine, quaternary nitrogen, and pyridine-N-oxide. From the deconvolution of the XPS spectra, the pyrrolic/pyridine and quaternary nitrogen functionalities were found to dominate in the samples prepared from urea. All samples showed increased basicity after nitrogen incorporation.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8